From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- media/ffvpx/libavcodec/libvorbisdec.c | 224 ++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 media/ffvpx/libavcodec/libvorbisdec.c (limited to 'media/ffvpx/libavcodec/libvorbisdec.c') diff --git a/media/ffvpx/libavcodec/libvorbisdec.c b/media/ffvpx/libavcodec/libvorbisdec.c new file mode 100644 index 0000000000..a5e7a691d6 --- /dev/null +++ b/media/ffvpx/libavcodec/libvorbisdec.c @@ -0,0 +1,224 @@ +/* + * Copyright (c) 2002 Mark Hills + * + * 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 + +#include "avcodec.h" +#include "bytestream.h" +#include "codec_internal.h" +#include "decode.h" + +typedef struct OggVorbisDecContext { + 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 */ + vorbis_comment vc; /**< VorbisComment info */ + ogg_packet op; /**< ogg packet */ +} OggVorbisDecContext; + +static int oggvorbis_decode_close(AVCodecContext *avccontext); + +static int oggvorbis_decode_init(AVCodecContext *avccontext) { + OggVorbisDecContext *context = avccontext->priv_data ; + uint8_t *p= avccontext->extradata; + int i, hsizes[3], ret; + unsigned char *headers[3], *extradata = avccontext->extradata; + + if(! avccontext->extradata_size || ! p) { + av_log(avccontext, AV_LOG_ERROR, "vorbis extradata absent\n"); + return AVERROR(EINVAL); + } + + vorbis_info_init(&context->vi) ; + vorbis_comment_init(&context->vc) ; + + if(p[0] == 0 && p[1] == 30) { + int sizesum = 0; + for(i = 0; i < 3; i++){ + hsizes[i] = bytestream_get_be16((const uint8_t **)&p); + sizesum += 2 + hsizes[i]; + if (sizesum > avccontext->extradata_size) { + av_log(avccontext, AV_LOG_ERROR, "vorbis extradata too small\n"); + ret = AVERROR_INVALIDDATA; + goto error; + } + + headers[i] = p; + p += hsizes[i]; + } + } else if(*p == 2) { + unsigned int offset = 1; + unsigned int sizesum = 1; + p++; + for(i=0; i<2; i++) { + hsizes[i] = 0; + while((*p == 0xFF) && (sizesum < avccontext->extradata_size)) { + hsizes[i] += 0xFF; + offset++; + sizesum += 1 + 0xFF; + p++; + } + hsizes[i] += *p; + offset++; + sizesum += 1 + *p; + if(sizesum > avccontext->extradata_size) { + av_log(avccontext, AV_LOG_ERROR, + "vorbis header sizes damaged\n"); + ret = AVERROR_INVALIDDATA; + goto error; + } + p++; + } + hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset; +#if 0 + av_log(avccontext, AV_LOG_DEBUG, + "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n", + hsizes[0], hsizes[1], hsizes[2], avccontext->extradata_size); +#endif + headers[0] = extradata + offset; + headers[1] = extradata + offset + hsizes[0]; + headers[2] = extradata + offset + hsizes[0] + hsizes[1]; + } else { + av_log(avccontext, AV_LOG_ERROR, + "vorbis initial header len is wrong: %d\n", *p); + ret = AVERROR_INVALIDDATA; + goto error; + } + + for(i=0; i<3; i++){ + context->op.b_o_s= i==0; + context->op.bytes = hsizes[i]; + context->op.packet = headers[i]; + if(vorbis_synthesis_headerin(&context->vi, &context->vc, &context->op)<0){ + av_log(avccontext, AV_LOG_ERROR, "%d. vorbis header damaged\n", i+1); + ret = AVERROR_INVALIDDATA; + goto error; + } + } + + av_channel_layout_uninit(&avccontext->ch_layout); + avccontext->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; + avccontext->ch_layout.nb_channels = context->vi.channels; + avccontext->sample_rate = context->vi.rate; + avccontext->sample_fmt = AV_SAMPLE_FMT_S16; + avccontext->time_base= (AVRational){1, avccontext->sample_rate}; + + vorbis_synthesis_init(&context->vd, &context->vi); + vorbis_block_init(&context->vd, &context->vb); + + return 0 ; + + error: + oggvorbis_decode_close(avccontext); + return ret; +} + + +static inline int conv(int samples, float **pcm, char *buf, int channels) { + int i, j; + ogg_int16_t *ptr, *data = (ogg_int16_t*)buf ; + float *mono ; + + for(i = 0 ; i < channels ; i++){ + ptr = &data[i]; + mono = pcm[i] ; + + for(j = 0 ; j < samples ; j++) { + *ptr = av_clip_int16(mono[j] * 32767.f); + ptr += channels; + } + } + + return 0 ; +} + +static int oggvorbis_decode_frame(AVCodecContext *avccontext, AVFrame *frame, + int *got_frame_ptr, AVPacket *avpkt) +{ + OggVorbisDecContext *context = avccontext->priv_data ; + float **pcm ; + ogg_packet *op= &context->op; + int samples, total_samples, total_bytes; + int ret; + int16_t *output; + + if(!avpkt->size){ + //FIXME flush + return 0; + } + + frame->nb_samples = 8192*4; + if ((ret = ff_get_buffer(avccontext, frame, 0)) < 0) + return ret; + output = (int16_t *)frame->data[0]; + + + op->packet = avpkt->data; + op->bytes = avpkt->size; + +// av_log(avccontext, AV_LOG_DEBUG, "%d %d %d %"PRId64" %"PRId64" %d %d\n", op->bytes, op->b_o_s, op->e_o_s, op->granulepos, op->packetno, buf_size, context->vi.rate); + +/* for(i=0; ibytes; i++) + av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]); + av_log(avccontext, AV_LOG_DEBUG, "\n");*/ + + if(vorbis_synthesis(&context->vb, op) == 0) + vorbis_synthesis_blockin(&context->vd, &context->vb) ; + + total_samples = 0 ; + total_bytes = 0 ; + + while((samples = vorbis_synthesis_pcmout(&context->vd, &pcm)) > 0) { + conv(samples, pcm, (char*)output + total_bytes, context->vi.channels) ; + total_bytes += samples * 2 * context->vi.channels ; + total_samples += samples ; + vorbis_synthesis_read(&context->vd, samples) ; + } + + frame->nb_samples = total_samples; + *got_frame_ptr = total_samples > 0; + return avpkt->size; +} + + +static int oggvorbis_decode_close(AVCodecContext *avccontext) { + OggVorbisDecContext *context = avccontext->priv_data ; + + vorbis_block_clear(&context->vb); + vorbis_dsp_clear(&context->vd); + vorbis_info_clear(&context->vi) ; + vorbis_comment_clear(&context->vc) ; + + return 0 ; +} + + +const FFCodec ff_libvorbis_decoder = { + .p.name = "libvorbis", + CODEC_LONG_NAME("libvorbis"), + .p.type = AVMEDIA_TYPE_AUDIO, + .p.id = AV_CODEC_ID_VORBIS, + .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_CHANNEL_CONF, + .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE, + .priv_data_size = sizeof(OggVorbisDecContext), + .init = oggvorbis_decode_init, + FF_CODEC_DECODE_CB(oggvorbis_decode_frame), + .close = oggvorbis_decode_close, +}; -- cgit v1.2.3