Merging upstream version 126.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 1279 insertions, 5 deletions

diff --git a/media/ffvpx/README_MOZILLA b/media/ffvpx/README_MOZILLA
index 1c00f2761a..b766be4abd 100644
--- a/media/ffvpx/README_MOZILLA
+++ b/media/ffvpx/README_MOZILLA
@@ -158,6 +158,8 @@ There are going to be a lot of changes in terms of symbols exported. Adjust
 `libavutil/avutil.symbols` and `libavcodec/avcodec.symbols` by removing and
 adding symbols until the build passes.
 
-Finally, apply the patch:
+Finally, apply the patches:
 - no-unicode-stdio.patch to avoid passing the infity symbol in unicode to an
   stdio.h function, that causes bug 1879740 issue on Windows.
+- opusenc-dtx.patch to allow enabling DTX in the opus encoder.
+
diff --git a/media/ffvpx/config_components_audio_only.h b/media/ffvpx/config_components_audio_only.h
index 0e61e23898..4ba265a9f7 100644
--- a/media/ffvpx/config_components_audio_only.h
+++ b/media/ffvpx/config_components_audio_only.h
@@ -787,7 +787,7 @@
 #define CONFIG_LIBMP3LAME_ENCODER 0
 #define CONFIG_LIBOPENCORE_AMRNB_ENCODER 0
 #define CONFIG_LIBOPENJPEG_ENCODER 0
-#define CONFIG_LIBOPUS_ENCODER 0
+#define CONFIG_LIBOPUS_ENCODER 1
 #define CONFIG_LIBRAV1E_ENCODER 0
 #define CONFIG_LIBSHINE_ENCODER 0
 #define CONFIG_LIBSPEEX_ENCODER 0
@@ -795,7 +795,7 @@
 #define CONFIG_LIBTHEORA_ENCODER 0
 #define CONFIG_LIBTWOLAME_ENCODER 0
 #define CONFIG_LIBVO_AMRWBENC_ENCODER 0
-#define CONFIG_LIBVORBIS_ENCODER 0
+#define CONFIG_LIBVORBIS_ENCODER 1
 #define CONFIG_LIBVPX_VP8_ENCODER 0
 #define CONFIG_LIBVPX_VP9_ENCODER 0
 #define CONFIG_LIBWEBP_ANIM_ENCODER 0
diff --git a/media/ffvpx/config_components_audio_video.h b/media/ffvpx/config_components_audio_video.h
index c8423a895e..220eb6ca52 100644
--- a/media/ffvpx/config_components_audio_video.h
+++ b/media/ffvpx/config_components_audio_video.h
@@ -810,7 +810,7 @@
 #define CONFIG_LIBMP3LAME_ENCODER 0
 #define CONFIG_LIBOPENCORE_AMRNB_ENCODER 0
 #define CONFIG_LIBOPENJPEG_ENCODER 0
-#define CONFIG_LIBOPUS_ENCODER 0
+#define CONFIG_LIBOPUS_ENCODER 1
 #define CONFIG_LIBRAV1E_ENCODER 0
 #define CONFIG_LIBSHINE_ENCODER 0
 #define CONFIG_LIBSPEEX_ENCODER 0
@@ -818,7 +818,7 @@
 #define CONFIG_LIBTHEORA_ENCODER 0
 #define CONFIG_LIBTWOLAME_ENCODER 0
 #define CONFIG_LIBVO_AMRWBENC_ENCODER 0
-#define CONFIG_LIBVORBIS_ENCODER 0
+#define CONFIG_LIBVORBIS_ENCODER 1
 #define CONFIG_LIBVPX_VP8_ENCODER 1
 #define CONFIG_LIBVPX_VP9_ENCODER 1
 #define CONFIG_LIBWEBP_ANIM_ENCODER 0
diff --git a/media/ffvpx/libavcodec/audio_frame_queue.c b/media/ffvpx/libavcodec/audio_frame_queue.c
new file mode 100644
index 0000000000..08b4b368c7
--- /dev/null
+++ b/media/ffvpx/libavcodec/audio_frame_queue.c
@@ -0,0 +1,113 @@
+/*
+ * Audio Frame Queue
+ * Copyright (c) 2012 Justin Ruggles
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/common.h"
+#include "audio_frame_queue.h"
+#include "encode.h"
+#include "libavutil/avassert.h"
+
+av_cold void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq)
+{
+    afq->avctx = avctx;
+    afq->remaining_delay   = avctx->initial_padding;
+    afq->remaining_samples = avctx->initial_padding;
+    afq->frame_count       = 0;
+}
+
+void ff_af_queue_close(AudioFrameQueue *afq)
+{
+    if(afq->frame_count)
+        av_log(afq->avctx, AV_LOG_WARNING, "%d frames left in the queue on closing\n", afq->frame_count);
+    av_freep(&afq->frames);
+    memset(afq, 0, sizeof(*afq));
+}
+
+int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f)
+{
+    AudioFrame *new = av_fast_realloc(afq->frames, &afq->frame_alloc, sizeof(*afq->frames)*(afq->frame_count+1));
+    if(!new)
+        return AVERROR(ENOMEM);
+    afq->frames = new;
+    new += afq->frame_count;
+
+    /* get frame parameters */
+    new->duration = f->nb_samples;
+    new->duration += afq->remaining_delay;
+    if (f->pts != AV_NOPTS_VALUE) {
+        new->pts = av_rescale_q(f->pts,
+                                      afq->avctx->time_base,
+                                      (AVRational){ 1, afq->avctx->sample_rate });
+        new->pts -= afq->remaining_delay;
+        if(afq->frame_count && new[-1].pts >= new->pts)
+            av_log(afq->avctx, AV_LOG_WARNING, "Queue input is backward in time\n");
+    } else {
+        new->pts = AV_NOPTS_VALUE;
+    }
+    afq->remaining_delay = 0;
+
+    /* add frame sample count */
+    afq->remaining_samples += f->nb_samples;
+
+    afq->frame_count++;
+
+    return 0;
+}
+
+void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
+                        int64_t *duration)
+{
+    int64_t out_pts = AV_NOPTS_VALUE;
+    int removed_samples = 0;
+    int i;
+
+    if (afq->frame_count || afq->frame_alloc) {
+        if (afq->frames->pts != AV_NOPTS_VALUE)
+            out_pts = afq->frames->pts;
+    }
+    if(!afq->frame_count)
+        av_log(afq->avctx, AV_LOG_WARNING, "Trying to remove %d samples, but the queue is empty\n", nb_samples);
+    if (pts)
+        *pts = ff_samples_to_time_base(afq->avctx, out_pts);
+
+    for(i=0; nb_samples && i<afq->frame_count; i++){
+        int n= FFMIN(afq->frames[i].duration, nb_samples);
+        afq->frames[i].duration -= n;
+        nb_samples              -= n;
+        removed_samples         += n;
+        if(afq->frames[i].pts != AV_NOPTS_VALUE)
+            afq->frames[i].pts      += n;
+    }
+    afq->remaining_samples -= removed_samples;
+    i -= i && afq->frames[i-1].duration;
+    memmove(afq->frames, afq->frames + i, sizeof(*afq->frames) * (afq->frame_count - i));
+    afq->frame_count -= i;
+
+    if(nb_samples){
+        av_assert0(!afq->frame_count);
+        av_assert0(afq->remaining_samples == afq->remaining_delay);
+        if(afq->frames && afq->frames[0].pts != AV_NOPTS_VALUE)
+            afq->frames[0].pts += nb_samples;
+        av_log(afq->avctx, AV_LOG_DEBUG, "Trying to remove %d more samples than there are in the queue\n", nb_samples);
+    }
+    if (duration)
+        *duration = ff_samples_to_time_base(afq->avctx, removed_samples);
+}
diff --git a/media/ffvpx/libavcodec/audio_frame_queue.h b/media/ffvpx/libavcodec/audio_frame_queue.h
new file mode 100644
index 0000000000..d8076eae54
--- /dev/null
+++ b/media/ffvpx/libavcodec/audio_frame_queue.h
@@ -0,0 +1,83 @@
+/*
+ * Audio Frame Queue
+ * Copyright (c) 2012 Justin Ruggles
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AUDIO_FRAME_QUEUE_H
+#define AVCODEC_AUDIO_FRAME_QUEUE_H
+
+#include "avcodec.h"
+
+typedef struct AudioFrame {
+    int64_t pts;
+    int duration;
+} AudioFrame;
+
+typedef struct AudioFrameQueue {
+    AVCodecContext *avctx;
+    int remaining_delay;
+    int remaining_samples;
+    AudioFrame *frames;
+    unsigned frame_count;
+    unsigned frame_alloc;
+} AudioFrameQueue;
+
+/**
+ * Initialize AudioFrameQueue.
+ *
+ * @param avctx context to use for time_base and av_log
+ * @param afq   queue context
+ */
+void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq);
+
+/**
+ * Close AudioFrameQueue.
+ *
+ * Frees memory if needed.
+ *
+ * @param afq queue context
+ */
+void ff_af_queue_close(AudioFrameQueue *afq);
+
+/**
+ * Add a frame to the queue.
+ *
+ * @param afq queue context
+ * @param f   frame to add to the queue
+ */
+int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f);
+
+/**
+ * Remove frame(s) from the queue.
+ *
+ * Retrieves the pts of the next available frame, or a generated pts based on
+ * the last frame duration if there are no frames left in the queue. The number
+ * of requested samples should be the full number of samples represented by the
+ * packet that will be output by the encoder. If fewer samples are available
+ * in the queue, a smaller value will be used for the output duration.
+ *
+ * @param afq           queue context
+ * @param nb_samples    number of samples to remove from the queue
+ * @param[out] pts      output packet pts
+ * @param[out] duration output packet duration
+ */
+void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
+                        int64_t *duration);
+
+#endif /* AVCODEC_AUDIO_FRAME_QUEUE_H */
diff --git a/media/ffvpx/libavcodec/codec_list.c b/media/ffvpx/libavcodec/codec_list.c
index 04259e3cd7..7c6b0ceacd 100644
--- a/media/ffvpx/libavcodec/codec_list.c
+++ b/media/ffvpx/libavcodec/codec_list.c
@@ -20,6 +20,9 @@ static const FFCodec * const codec_list[] = {
 #if CONFIG_LIBVORBIS_DECODER
     &ff_libvorbis_decoder,
 #endif
+#if CONFIG_LIBVORBIS_ENCODER
+    &ff_libvorbis_encoder,
+#endif
 #if CONFIG_PCM_ALAW_DECODER
     &ff_pcm_alaw_decoder,
 #endif
@@ -44,6 +47,9 @@ static const FFCodec * const codec_list[] = {
 #if CONFIG_LIBOPUS_DECODER
     &ff_libopus_decoder,
 #endif
+#if CONFIG_LIBOPUS_ENCODER
+    &ff_libopus_encoder,
+#endif
 #if CONFIG_LIBVPX_VP8_DECODER
     &ff_libvpx_vp8_decoder,
 #endif
diff --git a/media/ffvpx/libavcodec/libopusenc.c b/media/ffvpx/libavcodec/libopusenc.c
new file mode 100644
index 0000000000..68667e3350
--- /dev/null
+++ b/media/ffvpx/libavcodec/libopusenc.c
@@ -0,0 +1,610 @@
+/*
+ * Opus encoder using libopus
+ * Copyright (c) 2012 Nathan Caldwell
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <opus.h>
+#include <opus_multistream.h>
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "bytestream.h"
+#include "codec_internal.h"
+#include "encode.h"
+#include "libopus.h"
+#include "audio_frame_queue.h"
+#include "vorbis_data.h"
+
+typedef struct LibopusEncOpts {
+    int vbr;
+    int application;
+    int packet_loss;
+    int fec;
+    int complexity;
+    float frame_duration;
+    int packet_size;
+    int max_bandwidth;
+    int mapping_family;
+    int dtx;
+#ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
+    int apply_phase_inv;
+#endif
+} LibopusEncOpts;
+
+typedef struct LibopusEncContext {
+    AVClass *class;
+    OpusMSEncoder *enc;
+    int stream_count;
+    uint8_t *samples;
+    LibopusEncOpts opts;
+    AudioFrameQueue afq;
+    const uint8_t *encoder_channel_map;
+} LibopusEncContext;
+
+static const uint8_t opus_coupled_streams[8] = {
+    0, 1, 1, 2, 2, 2, 2, 3
+};
+
+/* Opus internal to Vorbis channel order mapping written in the header */
+static const uint8_t opus_vorbis_channel_map[8][8] = {
+    { 0 },
+    { 0, 1 },
+    { 0, 2, 1 },
+    { 0, 1, 2, 3 },
+    { 0, 4, 1, 2, 3 },
+    { 0, 4, 1, 2, 3, 5 },
+    { 0, 4, 1, 2, 3, 5, 6 },
+    { 0, 6, 1, 2, 3, 4, 5, 7 },
+};
+
+/* libavcodec to libopus channel order mapping, passed to libopus */
+static const uint8_t libavcodec_libopus_channel_map[8][8] = {
+    { 0 },
+    { 0, 1 },
+    { 0, 1, 2 },
+    { 0, 1, 2, 3 },
+    { 0, 1, 3, 4, 2 },
+    { 0, 1, 4, 5, 2, 3 },
+    { 0, 1, 5, 6, 2, 4, 3 },
+    { 0, 1, 6, 7, 4, 5, 2, 3 },
+};
+
+static void libopus_write_header(AVCodecContext *avctx, int stream_count,
+                                 int coupled_stream_count,
+                                 int mapping_family,
+                                 const uint8_t *channel_mapping)
+{
+    uint8_t *p   = avctx->extradata;
+    int channels = avctx->ch_layout.nb_channels;
+
+    bytestream_put_buffer(&p, "OpusHead", 8);
+    bytestream_put_byte(&p, 1); /* Version */
+    bytestream_put_byte(&p, channels);
+    bytestream_put_le16(&p, avctx->initial_padding * 48000 / avctx->sample_rate); /* Lookahead samples at 48kHz */
+    bytestream_put_le32(&p, avctx->sample_rate); /* Original sample rate */
+    bytestream_put_le16(&p, 0); /* Gain of 0dB is recommended. */
+
+    /* Channel mapping */
+    bytestream_put_byte(&p, mapping_family);
+    if (mapping_family != 0) {
+        bytestream_put_byte(&p, stream_count);
+        bytestream_put_byte(&p, coupled_stream_count);
+        bytestream_put_buffer(&p, channel_mapping, channels);
+    }
+}
+
+static int libopus_configure_encoder(AVCodecContext *avctx, OpusMSEncoder *enc,
+                                     LibopusEncOpts *opts)
+{
+    int ret;
+
+    if (avctx->global_quality) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Quality-based encoding not supported, "
+               "please specify a bitrate and VBR setting.\n");
+        return AVERROR(EINVAL);
+    }
+
+    ret = opus_multistream_encoder_ctl(enc, OPUS_SET_BITRATE(avctx->bit_rate));
+    if (ret != OPUS_OK) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Failed to set bitrate: %s\n", opus_strerror(ret));
+        return ret;
+    }
+
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_COMPLEXITY(opts->complexity));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set complexity: %s\n", opus_strerror(ret));
+
+    ret = opus_multistream_encoder_ctl(enc, OPUS_SET_VBR(!!opts->vbr));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set VBR: %s\n", opus_strerror(ret));
+
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_VBR_CONSTRAINT(opts->vbr == 2));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set constrained VBR: %s\n", opus_strerror(ret));
+
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_PACKET_LOSS_PERC(opts->packet_loss));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set expected packet loss percentage: %s\n",
+               opus_strerror(ret));
+
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_INBAND_FEC(opts->fec));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set inband FEC: %s\n",
+               opus_strerror(ret));
+
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_DTX(opts->dtx));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set DTX: %s\n",
+               opus_strerror(ret));
+
+    if (avctx->cutoff) {
+        ret = opus_multistream_encoder_ctl(enc,
+                                           OPUS_SET_MAX_BANDWIDTH(opts->max_bandwidth));
+        if (ret != OPUS_OK)
+            av_log(avctx, AV_LOG_WARNING,
+                   "Unable to set maximum bandwidth: %s\n", opus_strerror(ret));
+    }
+
+#ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
+    ret = opus_multistream_encoder_ctl(enc,
+                                       OPUS_SET_PHASE_INVERSION_DISABLED(!opts->apply_phase_inv));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to set phase inversion: %s\n",
+               opus_strerror(ret));
+#endif
+    return OPUS_OK;
+}
+
+static int libopus_check_max_channels(AVCodecContext *avctx,
+                                      int max_channels) {
+    if (avctx->ch_layout.nb_channels > max_channels) {
+        av_log(avctx, AV_LOG_ERROR, "Opus mapping family undefined for %d channels.\n",
+               avctx->ch_layout.nb_channels);
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+static int libopus_check_vorbis_layout(AVCodecContext *avctx, int mapping_family) {
+    av_assert2(avctx->ch_layout.nb_channels < FF_ARRAY_ELEMS(ff_vorbis_ch_layouts));
+
+    if (avctx->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
+        av_log(avctx, AV_LOG_WARNING,
+               "No channel layout specified. Opus encoder will use Vorbis "
+               "channel layout for %d channels.\n", avctx->ch_layout.nb_channels);
+    } else if (av_channel_layout_compare(&avctx->ch_layout, &ff_vorbis_ch_layouts[avctx->ch_layout.nb_channels - 1])) {
+        char name[32];
+
+        av_channel_layout_describe(&avctx->ch_layout, name, sizeof(name));
+        av_log(avctx, AV_LOG_ERROR,
+               "Invalid channel layout %s for specified mapping family %d.\n",
+               name, mapping_family);
+
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+static int libopus_validate_layout_and_get_channel_map(
+        AVCodecContext *avctx,
+        int mapping_family,
+        const uint8_t ** channel_map_result)
+{
+    const uint8_t * channel_map = NULL;
+    int ret;
+
+    switch (mapping_family) {
+    case -1:
+        ret = libopus_check_max_channels(avctx, 8);
+        if (ret == 0) {
+            ret = libopus_check_vorbis_layout(avctx, mapping_family);
+            /* Channels do not need to be reordered. */
+        }
+
+        break;
+    case 0:
+        ret = libopus_check_max_channels(avctx, 2);
+        if (ret == 0) {
+            ret = libopus_check_vorbis_layout(avctx, mapping_family);
+        }
+        break;
+    case 1:
+        /* Opus expects channels to be in Vorbis order. */
+        ret = libopus_check_max_channels(avctx, 8);
+        if (ret == 0) {
+            ret = libopus_check_vorbis_layout(avctx, mapping_family);
+            channel_map = ff_vorbis_channel_layout_offsets[avctx->ch_layout.nb_channels - 1];
+        }
+        break;
+    case 255:
+        ret = libopus_check_max_channels(avctx, 254);
+        break;
+    default:
+        av_log(avctx, AV_LOG_WARNING,
+               "Unknown channel mapping family %d. Output channel layout may be invalid.\n",
+               mapping_family);
+        ret = 0;
+    }
+
+    *channel_map_result = channel_map;
+    return ret;
+}
+
+static av_cold int libopus_encode_init(AVCodecContext *avctx)
+{
+    LibopusEncContext *opus = avctx->priv_data;
+    OpusMSEncoder *enc;
+    uint8_t libopus_channel_mapping[255];
+    int ret = OPUS_OK;
+    int channels = avctx->ch_layout.nb_channels;
+    int av_ret;
+    int coupled_stream_count, header_size, frame_size;
+    int mapping_family;
+
+    frame_size = opus->opts.frame_duration * 48000 / 1000;
+    switch (frame_size) {
+    case 120:
+    case 240:
+        if (opus->opts.application != OPUS_APPLICATION_RESTRICTED_LOWDELAY)
+            av_log(avctx, AV_LOG_WARNING,
+                   "LPC mode cannot be used with a frame duration of less "
+                   "than 10ms. Enabling restricted low-delay mode.\n"
+                   "Use a longer frame duration if this is not what you want.\n");
+        /* Frame sizes less than 10 ms can only use MDCT mode, so switching to
+         * RESTRICTED_LOWDELAY avoids an unnecessary extra 2.5ms lookahead. */
+        opus->opts.application = OPUS_APPLICATION_RESTRICTED_LOWDELAY;
+    case 480:
+    case 960:
+    case 1920:
+    case 2880:
+#ifdef OPUS_FRAMESIZE_120_MS
+    case 3840:
+    case 4800:
+    case 5760:
+#endif
+        opus->opts.packet_size =
+        avctx->frame_size      = frame_size * avctx->sample_rate / 48000;
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Invalid frame duration: %g.\n"
+               "Frame duration must be exactly one of: 2.5, 5, 10, 20, 40"
+#ifdef OPUS_FRAMESIZE_120_MS
+               ", 60, 80, 100 or 120.\n",
+#else
+               " or 60.\n",
+#endif
+               opus->opts.frame_duration);
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx->compression_level < 0 || avctx->compression_level > 10) {
+        av_log(avctx, AV_LOG_WARNING,
+               "Compression level must be in the range 0 to 10. "
+               "Defaulting to 10.\n");
+        opus->opts.complexity = 10;
+    } else {
+        opus->opts.complexity = avctx->compression_level;
+    }
+
+    if (avctx->cutoff) {
+        switch (avctx->cutoff) {
+        case  4000:
+            opus->opts.max_bandwidth = OPUS_BANDWIDTH_NARROWBAND;
+            break;
+        case  6000:
+            opus->opts.max_bandwidth = OPUS_BANDWIDTH_MEDIUMBAND;
+            break;
+        case  8000:
+            opus->opts.max_bandwidth = OPUS_BANDWIDTH_WIDEBAND;
+            break;
+        case 12000:
+            opus->opts.max_bandwidth = OPUS_BANDWIDTH_SUPERWIDEBAND;
+            break;
+        case 20000:
+            opus->opts.max_bandwidth = OPUS_BANDWIDTH_FULLBAND;
+            break;
+        default:
+            av_log(avctx, AV_LOG_WARNING,
+                   "Invalid frequency cutoff: %d. Using default maximum bandwidth.\n"
+                   "Cutoff frequency must be exactly one of: 4000, 6000, 8000, 12000 or 20000.\n",
+                   avctx->cutoff);
+            avctx->cutoff = 0;
+        }
+    }
+
+    /* Channels may need to be reordered to match opus mapping. */
+    av_ret = libopus_validate_layout_and_get_channel_map(avctx, opus->opts.mapping_family,
+                                                         &opus->encoder_channel_map);
+    if (av_ret) {
+        return av_ret;
+    }
+
+    if (opus->opts.mapping_family == -1) {
+        /* By default, use mapping family 1 for the header but use the older
+         * libopus multistream API to avoid surround masking. */
+
+        /* Set the mapping family so that the value is correct in the header */
+        mapping_family = channels > 2 ? 1 : 0;
+        coupled_stream_count = opus_coupled_streams[channels - 1];
+        opus->stream_count   = channels - coupled_stream_count;
+        memcpy(libopus_channel_mapping,
+               opus_vorbis_channel_map[channels - 1],
+               channels * sizeof(*libopus_channel_mapping));
+
+        enc = opus_multistream_encoder_create(
+            avctx->sample_rate, channels, opus->stream_count,
+            coupled_stream_count,
+            libavcodec_libopus_channel_map[channels - 1],
+            opus->opts.application, &ret);
+    } else {
+        /* Use the newer multistream API. The encoder will set the channel
+         * mapping and coupled stream counts to its internal defaults and will
+         * use surround masking analysis to save bits. */
+        mapping_family = opus->opts.mapping_family;
+        enc = opus_multistream_surround_encoder_create(
+            avctx->sample_rate, channels, mapping_family,
+            &opus->stream_count, &coupled_stream_count, libopus_channel_mapping,
+            opus->opts.application, &ret);
+    }
+
+    if (ret != OPUS_OK) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Failed to create encoder: %s\n", opus_strerror(ret));
+        return ff_opus_error_to_averror(ret);
+    }
+
+    if (!avctx->bit_rate) {
+        /* Sane default copied from opusenc */
+        avctx->bit_rate = 64000 * opus->stream_count +
+                          32000 * coupled_stream_count;
+        av_log(avctx, AV_LOG_WARNING,
+               "No bit rate set. Defaulting to %"PRId64" bps.\n", avctx->bit_rate);
+    }
+
+    if (avctx->bit_rate < 500 || avctx->bit_rate > 256000 * channels) {
+        av_log(avctx, AV_LOG_ERROR, "The bit rate %"PRId64" bps is unsupported. "
+               "Please choose a value between 500 and %d.\n", avctx->bit_rate,
+               256000 * channels);
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    ret = libopus_configure_encoder(avctx, enc, &opus->opts);
+    if (ret != OPUS_OK) {
+        ret = ff_opus_error_to_averror(ret);
+        goto fail;
+    }
+
+    /* Header includes channel mapping table if and only if mapping family is NOT 0 */
+    header_size = 19 + (mapping_family == 0 ? 0 : 2 + channels);
+    avctx->extradata = av_malloc(header_size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate extradata.\n");
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+    avctx->extradata_size = header_size;
+
+    opus->samples = av_calloc(frame_size, channels *
+                               av_get_bytes_per_sample(avctx->sample_fmt));
+    if (!opus->samples) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate samples buffer.\n");
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    ret = opus_multistream_encoder_ctl(enc, OPUS_GET_LOOKAHEAD(&avctx->initial_padding));
+    if (ret != OPUS_OK)
+        av_log(avctx, AV_LOG_WARNING,
+               "Unable to get number of lookahead samples: %s\n",
+               opus_strerror(ret));
+
+    libopus_write_header(avctx, opus->stream_count, coupled_stream_count,
+                         mapping_family, libopus_channel_mapping);
+
+    ff_af_queue_init(avctx, &opus->afq);
+
+    opus->enc = enc;
+
+    return 0;
+
+fail:
+    opus_multistream_encoder_destroy(enc);
+    return ret;
+}
+
+static void libopus_copy_samples_with_channel_map(
+    uint8_t *dst, const uint8_t *src, const uint8_t *channel_map,
+    int nb_channels, int nb_samples, int bytes_per_sample) {
+    int sample, channel;
+    for (sample = 0; sample < nb_samples; ++sample) {
+        for (channel = 0; channel < nb_channels; ++channel) {
+            const size_t src_pos = bytes_per_sample * (nb_channels * sample + channel);
+            const size_t dst_pos = bytes_per_sample * (nb_channels * sample + channel_map[channel]);
+
+            memcpy(&dst[dst_pos], &src[src_pos], bytes_per_sample);
+        }
+    }
+}
+
+static int libopus_encode(AVCodecContext *avctx, AVPacket *avpkt,
+                          const AVFrame *frame, int *got_packet_ptr)
+{
+    LibopusEncContext *opus = avctx->priv_data;
+    const int bytes_per_sample = av_get_bytes_per_sample(avctx->sample_fmt);
+    const int channels         = avctx->ch_layout.nb_channels;
+    const int sample_size      = channels * bytes_per_sample;
+    const uint8_t *audio;
+    int ret;
+    int discard_padding;
+
+    if (frame) {
+        ret = ff_af_queue_add(&opus->afq, frame);
+        if (ret < 0)
+            return ret;
+        if (opus->encoder_channel_map != NULL) {
+            audio = opus->samples;
+            libopus_copy_samples_with_channel_map(
+                opus->samples, frame->data[0], opus->encoder_channel_map,
+                channels, frame->nb_samples, bytes_per_sample);
+        } else if (frame->nb_samples < opus->opts.packet_size) {
+            audio = opus->samples;
+            memcpy(opus->samples, frame->data[0], frame->nb_samples * sample_size);
+        } else
+            audio = frame->data[0];
+    } else {
+        if (!opus->afq.remaining_samples || (!opus->afq.frame_alloc && !opus->afq.frame_count))
+            return 0;
+        audio = opus->samples;
+        memset(opus->samples, 0, opus->opts.packet_size * sample_size);
+    }
+
+    /* Maximum packet size taken from opusenc in opus-tools. 120ms packets
+     * consist of 6 frames in one packet. The maximum frame size is 1275
+     * bytes along with the largest possible packet header of 7 bytes. */
+    if ((ret = ff_alloc_packet(avctx, avpkt, (1275 * 6 + 7) * opus->stream_count)) < 0)
+        return ret;
+
+    if (avctx->sample_fmt == AV_SAMPLE_FMT_FLT)
+        ret = opus_multistream_encode_float(opus->enc, (const float *)audio,
+                                            opus->opts.packet_size,
+                                            avpkt->data, avpkt->size);
+    else
+        ret = opus_multistream_encode(opus->enc, (const opus_int16 *)audio,
+                                      opus->opts.packet_size,
+                                      avpkt->data, avpkt->size);
+
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Error encoding frame: %s\n", opus_strerror(ret));
+        return ff_opus_error_to_averror(ret);
+    }
+
+    av_shrink_packet(avpkt, ret);
+
+    ff_af_queue_remove(&opus->afq, opus->opts.packet_size,
+                       &avpkt->pts, &avpkt->duration);
+
+    discard_padding = opus->opts.packet_size - avpkt->duration;
+    // Check if subtraction resulted in an overflow
+    if ((discard_padding < opus->opts.packet_size) != (avpkt->duration > 0))
+        return AVERROR(EINVAL);
+    if (discard_padding > 0) {
+        uint8_t* side_data = av_packet_new_side_data(avpkt,
+                                                     AV_PKT_DATA_SKIP_SAMPLES,
+                                                     10);
+        if (!side_data)
+            return AVERROR(ENOMEM);
+        AV_WL32(side_data + 4, discard_padding);
+    }
+
+    *got_packet_ptr = 1;
+
+    return 0;
+}
+
+static av_cold int libopus_encode_close(AVCodecContext *avctx)
+{
+    LibopusEncContext *opus = avctx->priv_data;
+
+    opus_multistream_encoder_destroy(opus->enc);
+
+    ff_af_queue_close(&opus->afq);
+
+    av_freep(&opus->samples);
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(LibopusEncContext, opts.x)
+#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption libopus_options[] = {
+    { "application",    "Intended application type",           OFFSET(application),    AV_OPT_TYPE_INT,   { .i64 = OPUS_APPLICATION_AUDIO }, OPUS_APPLICATION_VOIP, OPUS_APPLICATION_RESTRICTED_LOWDELAY, FLAGS, "application" },
+        { "voip",           "Favor improved speech intelligibility",   0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_VOIP },                0, 0, FLAGS, "application" },
+        { "audio",          "Favor faithfulness to the input",         0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_AUDIO },               0, 0, FLAGS, "application" },
+        { "lowdelay",       "Restrict to only the lowest delay modes", 0, AV_OPT_TYPE_CONST, { .i64 = OPUS_APPLICATION_RESTRICTED_LOWDELAY }, 0, 0, FLAGS, "application" },
+    { "frame_duration", "Duration of a frame in milliseconds", OFFSET(frame_duration), AV_OPT_TYPE_FLOAT, { .dbl = 20.0 }, 2.5, 120.0, FLAGS },
+    { "packet_loss",    "Expected packet loss percentage",     OFFSET(packet_loss),    AV_OPT_TYPE_INT,   { .i64 = 0 },    0,   100,  FLAGS },
+    { "fec",             "Enable inband FEC. Expected packet loss must be non-zero",     OFFSET(fec),    AV_OPT_TYPE_BOOL,   { .i64 = 0 }, 0, 1, FLAGS },
+    { "vbr",            "Variable bit rate mode",              OFFSET(vbr),            AV_OPT_TYPE_INT,   { .i64 = 1 },    0,   2,    FLAGS, "vbr" },
+        { "off",            "Use constant bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "vbr" },
+        { "on",             "Use variable bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "vbr" },
+        { "constrained",    "Use constrained VBR",   0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, FLAGS, "vbr" },
+    { "mapping_family", "Channel Mapping Family",              OFFSET(mapping_family), AV_OPT_TYPE_INT,   { .i64 = -1 },   -1,  255,  FLAGS, "mapping_family" },
+    { "dtx", "Enable DTX", OFFSET(dtx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
+#ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
+    { "apply_phase_inv", "Apply intensity stereo phase inversion", OFFSET(apply_phase_inv), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
+#endif
+    { NULL },
+};
+
+static const AVClass libopus_class = {
+    .class_name = "libopus",
+    .item_name  = av_default_item_name,
+    .option     = libopus_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const FFCodecDefault libopus_defaults[] = {
+    { "b",                 "0" },
+    { "compression_level", "10" },
+    { NULL },
+};
+
+static const int libopus_sample_rates[] = {
+    48000, 24000, 16000, 12000, 8000, 0,
+};
+
+const FFCodec ff_libopus_encoder = {
+    .p.name          = "libopus",
+    CODEC_LONG_NAME("libopus Opus"),
+    .p.type          = AVMEDIA_TYPE_AUDIO,
+    .p.id            = AV_CODEC_ID_OPUS,
+    .p.capabilities  = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
+                       AV_CODEC_CAP_SMALL_LAST_FRAME,
+    .caps_internal   = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
+    .priv_data_size  = sizeof(LibopusEncContext),
+    .init            = libopus_encode_init,
+    FF_CODEC_ENCODE_CB(libopus_encode),
+    .close           = libopus_encode_close,
+    .p.sample_fmts   = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+                                                      AV_SAMPLE_FMT_FLT,
+                                                      AV_SAMPLE_FMT_NONE },
+    .p.supported_samplerates = libopus_sample_rates,
+    .p.priv_class    = &libopus_class,
+    .defaults        = libopus_defaults,
+    .p.wrapper_name  = "libopus",
+};
diff --git a/media/ffvpx/libavcodec/libvorbisenc.c b/media/ffvpx/libavcodec/libvorbisenc.c
new file mode 100644
index 0000000000..6331cf0d79
--- /dev/null
+++ b/media/ffvpx/libavcodec/libvorbisenc.c
@@ -0,0 +1,393 @@
+/*
+ * Copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <vorbis/vorbisenc.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/fifo.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "audio_frame_queue.h"
+#include "codec_internal.h"
+#include "encode.h"
+#include "version.h"
+#include "vorbis_parser.h"
+
+
+/* Number of samples the user should send in each call.
+ * This value is used because it is the LCD of all possible frame sizes, so
+ * an output packet will always start at the same point as one of the input
+ * packets.
+ */
+#define LIBVORBIS_FRAME_SIZE 64
+
+#define BUFFER_SIZE (1024 * 64)
+
+typedef struct LibvorbisEncContext {
+    AVClass *av_class;                  /**< class for AVOptions            */
+    vorbis_info vi;                     /**< vorbis_info used during init   */
+    vorbis_dsp_state vd;                /**< DSP state used for analysis    */
+    vorbis_block vb;                    /**< vorbis_block used for analysis */
+    AVFifo *pkt_fifo;                   /**< output packet buffer           */
+    int eof;                            /**< end-of-file flag               */
+    int dsp_initialized;                /**< vd has been initialized        */
+    vorbis_comment vc;                  /**< VorbisComment info             */
+    double iblock;                      /**< impulse block bias option      */
+    AVVorbisParseContext *vp;           /**< parse context to get durations */
+    AudioFrameQueue afq;                /**< frame queue for timestamps     */
+} LibvorbisEncContext;
+
+static const AVOption options[] = {
+    { "iblock", "Sets the impulse block bias", offsetof(LibvorbisEncContext, iblock), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, -15, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+    { NULL }
+};
+
+static const FFCodecDefault defaults[] = {
+    { "b",  "0" },
+    { NULL },
+};
+
+static const AVClass vorbis_class = {
+    .class_name = "libvorbis",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const uint8_t vorbis_encoding_channel_layout_offsets[8][8] = {
+    { 0 },
+    { 0, 1 },
+    { 0, 2, 1 },
+    { 0, 1, 2, 3 },
+    { 0, 2, 1, 3, 4 },
+    { 0, 2, 1, 4, 5, 3 },
+    { 0, 2, 1, 5, 6, 4, 3 },
+    { 0, 2, 1, 6, 7, 4, 5, 3 },
+};
+
+static int vorbis_error_to_averror(int ov_err)
+{
+    switch (ov_err) {
+    case OV_EFAULT: return AVERROR_BUG;
+    case OV_EINVAL: return AVERROR(EINVAL);
+    case OV_EIMPL:  return AVERROR(EINVAL);
+    default:        return AVERROR_UNKNOWN;
+    }
+}
+
+static av_cold int libvorbis_setup(vorbis_info *vi, AVCodecContext *avctx)
+{
+    LibvorbisEncContext *s = avctx->priv_data;
+    int channels = avctx->ch_layout.nb_channels;
+    double cfreq;
+    int ret;
+
+    if (avctx->flags & AV_CODEC_FLAG_QSCALE || !avctx->bit_rate) {
+        /* variable bitrate
+         * NOTE: we use the oggenc range of -1 to 10 for global_quality for
+         *       user convenience, but libvorbis uses -0.1 to 1.0.
+         */
+        float q = avctx->global_quality / (float)FF_QP2LAMBDA;
+        /* default to 3 if the user did not set quality or bitrate */
+        if (!(avctx->flags & AV_CODEC_FLAG_QSCALE))
+            q = 3.0;
+        if ((ret = vorbis_encode_setup_vbr(vi, channels,
+                                           avctx->sample_rate,
+                                           q / 10.0)))
+            goto error;
+    } else {
+        int minrate = avctx->rc_min_rate > 0 ? avctx->rc_min_rate : -1;
+        int maxrate = avctx->rc_max_rate > 0 ? avctx->rc_max_rate : -1;
+
+        /* average bitrate */
+        if ((ret = vorbis_encode_setup_managed(vi, channels,
+                                               avctx->sample_rate, maxrate,
+                                               avctx->bit_rate, minrate)))
+            goto error;
+
+        /* variable bitrate by estimate, disable slow rate management */
+        if (minrate == -1 && maxrate == -1)
+            if ((ret = vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE2_SET, NULL)))
+                goto error; /* should not happen */
+    }
+
+    /* cutoff frequency */
+    if (avctx->cutoff > 0) {
+        cfreq = avctx->cutoff / 1000.0;
+        if ((ret = vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq)))
+            goto error; /* should not happen */
+    }
+
+    /* impulse block bias */
+    if (s->iblock) {
+        if ((ret = vorbis_encode_ctl(vi, OV_ECTL_IBLOCK_SET, &s->iblock)))
+            goto error;
+    }
+
+    if ((channels == 3 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_SURROUND)) ||
+        (channels == 4 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_2_2) &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_QUAD)) ||
+        (channels == 5 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0) &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0_BACK)) ||
+        (channels == 6 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1) &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1_BACK)) ||
+        (channels == 7 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_6POINT1)) ||
+        (channels == 8 &&
+         av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1))) {
+        if (avctx->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
+            char name[32];
+            av_channel_layout_describe(&avctx->ch_layout, name, sizeof(name));
+            av_log(avctx, AV_LOG_ERROR, "%s not supported by Vorbis: "
+                                             "output stream will have incorrect "
+                                             "channel layout.\n", name);
+        } else {
+            av_log(avctx, AV_LOG_WARNING, "No channel layout specified. The encoder "
+                                               "will use Vorbis channel layout for "
+                                               "%d channels.\n", channels);
+        }
+    }
+
+    if ((ret = vorbis_encode_setup_init(vi)))
+        goto error;
+
+    return 0;
+error:
+    return vorbis_error_to_averror(ret);
+}
+
+/* How many bytes are needed for a buffer of length 'l' */
+static int xiph_len(int l)
+{
+    return 1 + l / 255 + l;
+}
+
+static av_cold int libvorbis_encode_close(AVCodecContext *avctx)
+{
+    LibvorbisEncContext *s = avctx->priv_data;
+
+    /* notify vorbisenc this is EOF */
+    if (s->dsp_initialized)
+        vorbis_analysis_wrote(&s->vd, 0);
+
+    vorbis_block_clear(&s->vb);
+    vorbis_dsp_clear(&s->vd);
+    vorbis_info_clear(&s->vi);
+
+    av_fifo_freep2(&s->pkt_fifo);
+    ff_af_queue_close(&s->afq);
+
+    av_vorbis_parse_free(&s->vp);
+
+    return 0;
+}
+
+static av_cold int libvorbis_encode_init(AVCodecContext *avctx)
+{
+    LibvorbisEncContext *s = avctx->priv_data;
+    ogg_packet header, header_comm, header_code;
+    uint8_t *p;
+    unsigned int offset;
+    int ret;
+
+    vorbis_info_init(&s->vi);
+    if ((ret = libvorbis_setup(&s->vi, avctx))) {
+        av_log(avctx, AV_LOG_ERROR, "encoder setup failed\n");
+        goto error;
+    }
+    if ((ret = vorbis_analysis_init(&s->vd, &s->vi))) {
+        av_log(avctx, AV_LOG_ERROR, "analysis init failed\n");
+        ret = vorbis_error_to_averror(ret);
+        goto error;
+    }
+    s->dsp_initialized = 1;
+    if ((ret = vorbis_block_init(&s->vd, &s->vb))) {
+        av_log(avctx, AV_LOG_ERROR, "dsp init failed\n");
+        ret = vorbis_error_to_averror(ret);
+        goto error;
+    }
+
+    vorbis_comment_init(&s->vc);
+    if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
+        vorbis_comment_add_tag(&s->vc, "encoder", LIBAVCODEC_IDENT);
+
+    if ((ret = vorbis_analysis_headerout(&s->vd, &s->vc, &header, &header_comm,
+                                         &header_code))) {
+        ret = vorbis_error_to_averror(ret);
+        goto error;
+    }
+
+    avctx->extradata_size = 1 + xiph_len(header.bytes)      +
+                                xiph_len(header_comm.bytes) +
+                                header_code.bytes;
+    p = avctx->extradata = av_malloc(avctx->extradata_size +
+                                     AV_INPUT_BUFFER_PADDING_SIZE);
+    if (!p) {
+        ret = AVERROR(ENOMEM);
+        goto error;
+    }
+    p[0]    = 2;
+    offset  = 1;
+    offset += av_xiphlacing(&p[offset], header.bytes);
+    offset += av_xiphlacing(&p[offset], header_comm.bytes);
+    memcpy(&p[offset], header.packet, header.bytes);
+    offset += header.bytes;
+    memcpy(&p[offset], header_comm.packet, header_comm.bytes);
+    offset += header_comm.bytes;
+    memcpy(&p[offset], header_code.packet, header_code.bytes);
+    offset += header_code.bytes;
+    av_assert0(offset == avctx->extradata_size);
+
+    s->vp = av_vorbis_parse_init(avctx->extradata, avctx->extradata_size);
+    if (!s->vp) {
+        av_log(avctx, AV_LOG_ERROR, "invalid extradata\n");
+        return ret;
+    }
+
+    vorbis_comment_clear(&s->vc);
+
+    avctx->frame_size = LIBVORBIS_FRAME_SIZE;
+    ff_af_queue_init(avctx, &s->afq);
+
+    s->pkt_fifo = av_fifo_alloc2(BUFFER_SIZE, 1, 0);
+    if (!s->pkt_fifo) {
+        ret = AVERROR(ENOMEM);
+        goto error;
+    }
+
+    return 0;
+error:
+    libvorbis_encode_close(avctx);
+    return ret;
+}
+
+static int libvorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+                                  const AVFrame *frame, int *got_packet_ptr)
+{
+    LibvorbisEncContext *s = avctx->priv_data;
+    ogg_packet op;
+    int ret, duration;
+
+    /* send samples to libvorbis */
+    if (frame) {
+        const int samples = frame->nb_samples;
+        float **buffer;
+        int c, channels = s->vi.channels;
+
+        buffer = vorbis_analysis_buffer(&s->vd, samples);
+        for (c = 0; c < channels; c++) {
+            int co = (channels > 8) ? c :
+                     vorbis_encoding_channel_layout_offsets[channels - 1][c];
+            memcpy(buffer[c], frame->extended_data[co],
+                   samples * sizeof(*buffer[c]));
+        }
+        if ((ret = vorbis_analysis_wrote(&s->vd, samples)) < 0) {
+            av_log(avctx, AV_LOG_ERROR, "error in vorbis_analysis_wrote()\n");
+            return vorbis_error_to_averror(ret);
+        }
+        if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
+            return ret;
+    } else {
+        if (!s->eof && s->afq.frame_alloc)
+            if ((ret = vorbis_analysis_wrote(&s->vd, 0)) < 0) {
+                av_log(avctx, AV_LOG_ERROR, "error in vorbis_analysis_wrote()\n");
+                return vorbis_error_to_averror(ret);
+            }
+        s->eof = 1;
+    }
+
+    /* retrieve available packets from libvorbis */
+    while ((ret = vorbis_analysis_blockout(&s->vd, &s->vb)) == 1) {
+        if ((ret = vorbis_analysis(&s->vb, NULL)) < 0)
+            break;
+        if ((ret = vorbis_bitrate_addblock(&s->vb)) < 0)
+            break;
+
+        /* add any available packets to the output packet buffer */
+        while ((ret = vorbis_bitrate_flushpacket(&s->vd, &op)) == 1) {
+            if (av_fifo_can_write(s->pkt_fifo) < sizeof(ogg_packet) + op.bytes) {
+                av_log(avctx, AV_LOG_ERROR, "packet buffer is too small\n");
+                return AVERROR_BUG;
+            }
+            av_fifo_write(s->pkt_fifo, &op, sizeof(ogg_packet));
+            av_fifo_write(s->pkt_fifo, op.packet, op.bytes);
+        }
+        if (ret < 0) {
+            av_log(avctx, AV_LOG_ERROR, "error getting available packets\n");
+            break;
+        }
+    }
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "error getting available packets\n");
+        return vorbis_error_to_averror(ret);
+    }
+
+    /* Read an available packet if possible */
+    if (av_fifo_read(s->pkt_fifo, &op, sizeof(ogg_packet)) < 0)
+        return 0;
+
+    if ((ret = ff_get_encode_buffer(avctx, avpkt, op.bytes, 0)) < 0)
+        return ret;
+    av_fifo_read(s->pkt_fifo, avpkt->data, op.bytes);
+
+    avpkt->pts = ff_samples_to_time_base(avctx, op.granulepos);
+
+    duration = av_vorbis_parse_frame(s->vp, avpkt->data, avpkt->size);
+    if (duration > 0) {
+        /* we do not know encoder delay until we get the first packet from
+         * libvorbis, so we have to update the AudioFrameQueue counts */
+        if (!avctx->initial_padding && s->afq.frames) {
+            avctx->initial_padding    = duration;
+            av_assert0(!s->afq.remaining_delay);
+            s->afq.frames->duration  += duration;
+            if (s->afq.frames->pts != AV_NOPTS_VALUE)
+                s->afq.frames->pts       -= duration;
+            s->afq.remaining_samples += duration;
+        }
+        ff_af_queue_remove(&s->afq, duration, &avpkt->pts, &avpkt->duration);
+    }
+
+    *got_packet_ptr = 1;
+    return 0;
+}
+
+const FFCodec ff_libvorbis_encoder = {
+    .p.name         = "libvorbis",
+    CODEC_LONG_NAME("libvorbis"),
+    .p.type         = AVMEDIA_TYPE_AUDIO,
+    .p.id           = AV_CODEC_ID_VORBIS,
+    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
+                      AV_CODEC_CAP_SMALL_LAST_FRAME,
+    .caps_internal  = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
+    .priv_data_size = sizeof(LibvorbisEncContext),
+    .init           = libvorbis_encode_init,
+    FF_CODEC_ENCODE_CB(libvorbis_encode_frame),
+    .close          = libvorbis_encode_close,
+    .p.sample_fmts  = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+                                                      AV_SAMPLE_FMT_NONE },
+    .p.priv_class   = &vorbis_class,
+    .defaults       = defaults,
+    .p.wrapper_name = "libvorbis",
+};
diff --git a/media/ffvpx/libavcodec/moz.build b/media/ffvpx/libavcodec/moz.build
index 0ba603d172..886fa7a2cb 100644
--- a/media/ffvpx/libavcodec/moz.build
+++ b/media/ffvpx/libavcodec/moz.build
@@ -20,6 +20,7 @@ LOCAL_INCLUDES += ['/modules/fdlibm/inexact-math-override']
 SharedLibrary('mozavcodec')
 SOURCES += [
     'allcodecs.c',
+    'audio_frame_queue.c',
     'avcodec.c',
     'avdct.c',
     'avfft.c',
@@ -47,7 +48,9 @@ SOURCES += [
     'jrevdct.c',
     'libopus.c',
     'libopusdec.c',
+    'libopusenc.c',
     'libvorbisdec.c',
+    'libvorbisenc.c',
     'log2_tab.c',
     'mpegaudio.c',
     'mpegaudiodata.c',
diff --git a/media/ffvpx/libavutil/avutil.symbols b/media/ffvpx/libavutil/avutil.symbols
index 0ad6fad9cd..5ee7afb855 100644
--- a/media/ffvpx/libavutil/avutil.symbols
+++ b/media/ffvpx/libavutil/avutil.symbols
@@ -92,6 +92,7 @@ av_fifo_alloc
 av_fifo_alloc2
 av_fifo_alloc_array
 av_fifo_can_read
+av_fifo_can_write
 av_fifo_drain
 av_fifo_drain2
 av_fifo_free
diff --git a/media/ffvpx/opusenc-dtx.patch b/media/ffvpx/opusenc-dtx.patch
new file mode 100644
index 0000000000..bf9fc9de87
--- /dev/null
+++ b/media/ffvpx/opusenc-dtx.patch
@@ -0,0 +1,63 @@
+diff --git a/media/ffvpx/libavcodec/libopusenc.c b/media/ffvpx/libavcodec/libopusenc.c
+--- a/media/ffvpx/libavcodec/libopusenc.c
++++ b/media/ffvpx/libavcodec/libopusenc.c
+@@ -37,16 +37,17 @@ typedef struct LibopusEncOpts {
+     int application;
+     int packet_loss;
+     int fec;
+     int complexity;
+     float frame_duration;
+     int packet_size;
+     int max_bandwidth;
+     int mapping_family;
++    int dtx;
+ #ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
+     int apply_phase_inv;
+ #endif
+ } LibopusEncOpts;
+ 
+ typedef struct LibopusEncContext {
+     AVClass *class;
+     OpusMSEncoder *enc;
+@@ -154,16 +155,23 @@ static int libopus_configure_encoder(AVC
+ 
+     ret = opus_multistream_encoder_ctl(enc,
+                                        OPUS_SET_INBAND_FEC(opts->fec));
+     if (ret != OPUS_OK)
+         av_log(avctx, AV_LOG_WARNING,
+                "Unable to set inband FEC: %s\n",
+                opus_strerror(ret));
+ 
++    ret = opus_multistream_encoder_ctl(enc,
++                                       OPUS_SET_DTX(opts->dtx));
++    if (ret != OPUS_OK)
++        av_log(avctx, AV_LOG_WARNING,
++               "Unable to set DTX: %s\n",
++               opus_strerror(ret));
++
+     if (avctx->cutoff) {
+         ret = opus_multistream_encoder_ctl(enc,
+                                            OPUS_SET_MAX_BANDWIDTH(opts->max_bandwidth));
+         if (ret != OPUS_OK)
+             av_log(avctx, AV_LOG_WARNING,
+                    "Unable to set maximum bandwidth: %s\n", opus_strerror(ret));
+     }
+ 
+@@ -551,16 +559,17 @@ static const AVOption libopus_options[] 
+     { "frame_duration", "Duration of a frame in milliseconds", OFFSET(frame_duration), AV_OPT_TYPE_FLOAT, { .dbl = 20.0 }, 2.5, 120.0, FLAGS },
+     { "packet_loss",    "Expected packet loss percentage",     OFFSET(packet_loss),    AV_OPT_TYPE_INT,   { .i64 = 0 },    0,   100,  FLAGS },
+     { "fec",             "Enable inband FEC. Expected packet loss must be non-zero",     OFFSET(fec),    AV_OPT_TYPE_BOOL,   { .i64 = 0 }, 0, 1, FLAGS },
+     { "vbr",            "Variable bit rate mode",              OFFSET(vbr),            AV_OPT_TYPE_INT,   { .i64 = 1 },    0,   2,    FLAGS, "vbr" },
+         { "off",            "Use constant bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "vbr" },
+         { "on",             "Use variable bit rate", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "vbr" },
+         { "constrained",    "Use constrained VBR",   0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, FLAGS, "vbr" },
+     { "mapping_family", "Channel Mapping Family",              OFFSET(mapping_family), AV_OPT_TYPE_INT,   { .i64 = -1 },   -1,  255,  FLAGS, "mapping_family" },
++    { "dtx", "Enable DTX", OFFSET(dtx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
+ #ifdef OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST
+     { "apply_phase_inv", "Apply intensity stereo phase inversion", OFFSET(apply_phase_inv), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
+ #endif
+     { NULL },
+ };
+ 
+ static const AVClass libopus_class = {
+     .class_name = "libopus",