diff options
Diffstat (limited to 'third_party/dav1d/tools/input/section5.c')
| -rw-r--r-- | third_party/dav1d/tools/input/section5.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/third_party/dav1d/tools/input/section5.c b/third_party/dav1d/tools/input/section5.c new file mode 100644 index 0000000000..0c2ce28c63 --- /dev/null +++ b/third_party/dav1d/tools/input/section5.c @@ -0,0 +1,185 @@ +/* + * Copyright © 2019, VideoLAN and dav1d authors + * Copyright © 2019, Two Orioles, LLC + * Copyright © 2019, James Almer <jamrial@gmail.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> + +#include "dav1d/headers.h" + +#include "input/demuxer.h" +#include "input/parse.h" + +#define PROBE_SIZE 1024 + +static int section5_probe(const uint8_t *data) { + int ret, cnt = 0; + + // Check that the first OBU is a Temporal Delimiter. + size_t obu_size; + enum Dav1dObuType type; + ret = parse_obu_header(data + cnt, PROBE_SIZE - cnt, + &obu_size, &type, 0); + if (ret < 0 || type != DAV1D_OBU_TD || obu_size > 0) + return 0; + cnt += ret; + + // look for first frame and accompanying sequence header + int seq = 0; + while (cnt < PROBE_SIZE) { + ret = parse_obu_header(data + cnt, PROBE_SIZE - cnt, + &obu_size, &type, 0); + if (ret < 0) + return 0; + cnt += ret; + + switch (type) { + case DAV1D_OBU_SEQ_HDR: + seq = 1; + break; + case DAV1D_OBU_FRAME: + case DAV1D_OBU_FRAME_HDR: + return seq; + case DAV1D_OBU_TD: + case DAV1D_OBU_TILE_GRP: + return 0; + default: + break; + } + } + + return 0; +} + +typedef struct DemuxerPriv { + FILE *f; +} Section5InputContext; + +static int section5_open(Section5InputContext *const c, const char *const file, + unsigned fps[2], unsigned *const num_frames, unsigned timebase[2]) +{ + if (!(c->f = fopen(file, "rb"))) { + fprintf(stderr, "Failed to open %s: %s\n", file, strerror(errno)); + return -1; + } + + // TODO: Parse sequence header and read timing info if any. + fps[0] = 25; + fps[1] = 1; + timebase[0] = 25; + timebase[1] = 1; + *num_frames = 0; + for (;;) { + uint8_t byte[2]; + + if (fread(&byte[0], 1, 1, c->f) < 1) + break; + const enum Dav1dObuType obu_type = (byte[0] >> 3) & 0xf; + if (obu_type == DAV1D_OBU_TD) + (*num_frames)++; + const int has_length_field = byte[0] & 0x2; + if (!has_length_field) + return -1; + const int has_extension = byte[0] & 0x4; + if (has_extension && fread(&byte[1], 1, 1, c->f) < 1) + return -1; + size_t len; + const int res = leb128(c->f, &len); + if (res < 0) + return -1; + fseeko(c->f, len, SEEK_CUR); // skip packet + } + fseeko(c->f, 0, SEEK_SET); + + return 0; +} + +static int section5_read(Section5InputContext *const c, Dav1dData *const data) { + size_t total_bytes = 0; + + for (int first = 1;; first = 0) { + uint8_t byte[2]; + + if (fread(&byte[0], 1, 1, c->f) < 1) { + if (!first && feof(c->f)) break; + return -1; + } + const enum Dav1dObuType obu_type = (byte[0] >> 3) & 0xf; + if (first) { + if (obu_type != DAV1D_OBU_TD) + return -1; + } else { + if (obu_type == DAV1D_OBU_TD) { + // include TD in next packet + fseeko(c->f, -1, SEEK_CUR); + break; + } + } + const int has_length_field = byte[0] & 0x2; + if (!has_length_field) + return -1; + const int has_extension = !!(byte[0] & 0x4); + if (has_extension && fread(&byte[1], 1, 1, c->f) < 1) + return -1; + size_t len; + const int res = leb128(c->f, &len); + if (res < 0) + return -1; + total_bytes += 1 + has_extension + res + len; + fseeko(c->f, len, SEEK_CUR); // skip packet, we'll read it below + } + + fseeko(c->f, -(off_t)total_bytes, SEEK_CUR); + uint8_t *ptr = dav1d_data_create(data, total_bytes); + if (!ptr) return -1; + if (fread(ptr, total_bytes, 1, c->f) != 1) { + fprintf(stderr, "Failed to read frame data: %s\n", strerror(errno)); + dav1d_data_unref(data); + return -1; + } + + return 0; +} + +static void section5_close(Section5InputContext *const c) { + fclose(c->f); +} + +const Demuxer section5_demuxer = { + .priv_data_size = sizeof(Section5InputContext), + .name = "section5", + .probe = section5_probe, + .probe_sz = PROBE_SIZE, + .open = section5_open, + .read = section5_read, + .close = section5_close, +}; |