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Diffstat (limited to 'ffmpeg/libavformat/spdifenc.c')
-rw-r--r--ffmpeg/libavformat/spdifenc.c556
1 files changed, 0 insertions, 556 deletions
diff --git a/ffmpeg/libavformat/spdifenc.c b/ffmpeg/libavformat/spdifenc.c
deleted file mode 100644
index 210d63f..0000000
--- a/ffmpeg/libavformat/spdifenc.c
+++ /dev/null
@@ -1,556 +0,0 @@
-/*
- * IEC 61937 muxer
- * Copyright (c) 2009 Bartlomiej Wolowiec
- * Copyright (c) 2010 Anssi Hannula
- * Copyright (c) 2010 Carl Eugen Hoyos
- *
- * 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
- */
-
-/**
- * @file
- * IEC-61937 encapsulation of various formats, used by S/PDIF
- * @author Bartlomiej Wolowiec
- * @author Anssi Hannula
- * @author Carl Eugen Hoyos
- */
-
-/*
- * Terminology used in specification:
- * data-burst - IEC61937 frame, contains header and encapsuled frame
- * burst-preambule - IEC61937 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
- * burst-payload - encapsuled frame
- * Pa, Pb - syncword - 0xF872, 0x4E1F
- * Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
- * and bitstream number (bits 13-15)
- * data-type - determines type of encapsuled frames
- * Pd - length code (number of bits or bytes of encapsuled frame - according to data_type)
- *
- * IEC 61937 frames at normal usage start every specific count of bytes,
- * dependent from data-type (spaces between packets are filled by zeros)
- */
-
-#include "avformat.h"
-#include "avio_internal.h"
-#include "spdif.h"
-#include "libavcodec/ac3.h"
-#include "libavcodec/dca.h"
-#include "libavcodec/aacadtsdec.h"
-#include "libavutil/opt.h"
-
-typedef struct IEC61937Context {
- const AVClass *av_class;
- enum IEC61937DataType data_type;///< burst info - reference to type of payload of the data-burst
- int length_code; ///< length code in bits or bytes, depending on data type
- int pkt_offset; ///< data burst repetition period in bytes
- uint8_t *buffer; ///< allocated buffer, used for swap bytes
- int buffer_size; ///< size of allocated buffer
-
- uint8_t *out_buf; ///< pointer to the outgoing data before byte-swapping
- int out_bytes; ///< amount of outgoing bytes
-
- int use_preamble; ///< preamble enabled (disabled for exactly pre-padded DTS)
- int extra_bswap; ///< extra bswap for payload (for LE DTS => standard BE DTS)
-
- uint8_t *hd_buf; ///< allocated buffer to concatenate hd audio frames
- int hd_buf_size; ///< size of the hd audio buffer
- int hd_buf_count; ///< number of frames in the hd audio buffer
- int hd_buf_filled; ///< amount of bytes in the hd audio buffer
-
- int dtshd_skip; ///< counter used for skipping DTS-HD frames
-
- /* AVOptions: */
- int dtshd_rate;
- int dtshd_fallback;
-#define SPDIF_FLAG_BIGENDIAN 0x01
- int spdif_flags;
-
- /// function, which generates codec dependent header information.
- /// Sets data_type and pkt_offset, and length_code, out_bytes, out_buf if necessary
- int (*header_info) (AVFormatContext *s, AVPacket *pkt);
-} IEC61937Context;
-
-static const AVOption options[] = {
-{ "spdif_flags", "IEC 61937 encapsulation flags", offsetof(IEC61937Context, spdif_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
-{ "be", "output in big-endian format (for use as s16be)", 0, AV_OPT_TYPE_CONST, {.i64 = SPDIF_FLAG_BIGENDIAN}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
-{ "dtshd_rate", "mux complete DTS frames in HD mode at the specified IEC958 rate (in Hz, default 0=disabled)", offsetof(IEC61937Context, dtshd_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 768000, AV_OPT_FLAG_ENCODING_PARAM },
-{ "dtshd_fallback_time", "min secs to strip HD for after an overflow (-1: till the end, default 60)", offsetof(IEC61937Context, dtshd_fallback), AV_OPT_TYPE_INT, {.i64 = 60}, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
-{ NULL },
-};
-
-static const AVClass spdif_class = {
- .class_name = "spdif",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- int bitstream_mode = pkt->data[5] & 0x7;
-
- ctx->data_type = IEC61937_AC3 | (bitstream_mode << 8);
- ctx->pkt_offset = AC3_FRAME_SIZE << 2;
- return 0;
-}
-
-static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- static const uint8_t eac3_repeat[4] = {6, 3, 2, 1};
- int repeat = 1;
-
- if ((pkt->data[4] & 0xc0) != 0xc0) /* fscod */
- repeat = eac3_repeat[(pkt->data[4] & 0x30) >> 4]; /* numblkscod */
-
- ctx->hd_buf = av_fast_realloc(ctx->hd_buf, &ctx->hd_buf_size, ctx->hd_buf_filled + pkt->size);
- if (!ctx->hd_buf)
- return AVERROR(ENOMEM);
-
- memcpy(&ctx->hd_buf[ctx->hd_buf_filled], pkt->data, pkt->size);
-
- ctx->hd_buf_filled += pkt->size;
- if (++ctx->hd_buf_count < repeat){
- ctx->pkt_offset = 0;
- return 0;
- }
- ctx->data_type = IEC61937_EAC3;
- ctx->pkt_offset = 24576;
- ctx->out_buf = ctx->hd_buf;
- ctx->out_bytes = ctx->hd_buf_filled;
- ctx->length_code = ctx->hd_buf_filled;
-
- ctx->hd_buf_count = 0;
- ctx->hd_buf_filled = 0;
- return 0;
-}
-
-/*
- * DTS type IV (DTS-HD) can be transmitted with various frame repetition
- * periods; longer repetition periods allow for longer packets and therefore
- * higher bitrate. Longer repetition periods mean that the constant bitrate of
- * the outputted IEC 61937 stream is higher.
- * The repetition period is measured in IEC 60958 frames (4 bytes).
- */
-static int spdif_dts4_subtype(int period)
-{
- switch (period) {
- case 512: return 0x0;
- case 1024: return 0x1;
- case 2048: return 0x2;
- case 4096: return 0x3;
- case 8192: return 0x4;
- case 16384: return 0x5;
- }
- return -1;
-}
-
-static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size,
- int sample_rate, int blocks)
-{
- IEC61937Context *ctx = s->priv_data;
- static const char dtshd_start_code[10] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe };
- int pkt_size = pkt->size;
- int period;
- int subtype;
-
- if (!core_size) {
- av_log(s, AV_LOG_ERROR, "HD mode not supported for this format\n");
- return AVERROR(EINVAL);
- }
-
- if (!sample_rate) {
- av_log(s, AV_LOG_ERROR, "Unknown DTS sample rate for HD\n");
- return AVERROR_INVALIDDATA;
- }
-
- period = ctx->dtshd_rate * (blocks << 5) / sample_rate;
- subtype = spdif_dts4_subtype(period);
-
- if (subtype < 0) {
- av_log(s, AV_LOG_ERROR, "Specified HD rate of %d Hz would require an "
- "impossible repetition period of %d for the current DTS stream"
- " (blocks = %d, sample rate = %d)\n", ctx->dtshd_rate, period,
- blocks << 5, sample_rate);
- return AVERROR(EINVAL);
- }
-
- /* set pkt_offset and DTS IV subtype according to the requested output
- * rate */
- ctx->pkt_offset = period * 4;
- ctx->data_type = IEC61937_DTSHD | subtype << 8;
-
- /* If the bitrate is too high for transmitting at the selected
- * repetition period setting, strip DTS-HD until a good amount
- * of consecutive non-overflowing HD frames have been observed.
- * This generally only happens if the caller is cramming a Master
- * Audio stream into 192kHz IEC 60958 (which may or may not fit). */
- if (sizeof(dtshd_start_code) + 2 + pkt_size
- > ctx->pkt_offset - BURST_HEADER_SIZE && core_size) {
- if (!ctx->dtshd_skip)
- av_log(s, AV_LOG_WARNING, "DTS-HD bitrate too high, "
- "temporarily sending core only\n");
- if (ctx->dtshd_fallback > 0)
- ctx->dtshd_skip = sample_rate * ctx->dtshd_fallback / (blocks << 5);
- else
- /* skip permanently (dtshd_fallback == -1) or just once
- * (dtshd_fallback == 0) */
- ctx->dtshd_skip = 1;
- }
- if (ctx->dtshd_skip && core_size) {
- pkt_size = core_size;
- if (ctx->dtshd_fallback >= 0)
- --ctx->dtshd_skip;
- }
-
- ctx->out_bytes = sizeof(dtshd_start_code) + 2 + pkt_size;
-
- /* Align so that (length_code & 0xf) == 0x8. This is reportedly needed
- * with some receivers, but the exact requirement is unconfirmed. */
- ctx->length_code = FFALIGN(ctx->out_bytes + 0x8, 0x10) - 0x8;
-
- av_fast_malloc(&ctx->hd_buf, &ctx->hd_buf_size, ctx->out_bytes);
- if (!ctx->hd_buf)
- return AVERROR(ENOMEM);
-
- ctx->out_buf = ctx->hd_buf;
-
- memcpy(ctx->hd_buf, dtshd_start_code, sizeof(dtshd_start_code));
- AV_WB16(ctx->hd_buf + sizeof(dtshd_start_code), pkt_size);
- memcpy(ctx->hd_buf + sizeof(dtshd_start_code) + 2, pkt->data, pkt_size);
-
- return 0;
-}
-
-static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- uint32_t syncword_dts = AV_RB32(pkt->data);
- int blocks;
- int sample_rate = 0;
- int core_size = 0;
-
- if (pkt->size < 9)
- return AVERROR_INVALIDDATA;
-
- switch (syncword_dts) {
- case DCA_MARKER_RAW_BE:
- blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
- core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
- sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
- break;
- case DCA_MARKER_RAW_LE:
- blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
- ctx->extra_bswap = 1;
- break;
- case DCA_MARKER_14B_BE:
- blocks =
- (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
- break;
- case DCA_MARKER_14B_LE:
- blocks =
- (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
- ctx->extra_bswap = 1;
- break;
- case DCA_HD_MARKER:
- /* We only handle HD frames that are paired with core. However,
- sometimes DTS-HD streams with core have a stray HD frame without
- core in the beginning of the stream. */
- av_log(s, AV_LOG_ERROR, "stray DTS-HD frame\n");
- return AVERROR_INVALIDDATA;
- default:
- av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%x\n", syncword_dts);
- return AVERROR_INVALIDDATA;
- }
- blocks++;
-
- if (ctx->dtshd_rate)
- /* DTS type IV output requested */
- return spdif_header_dts4(s, pkt, core_size, sample_rate, blocks);
-
- switch (blocks) {
- case 512 >> 5: ctx->data_type = IEC61937_DTS1; break;
- case 1024 >> 5: ctx->data_type = IEC61937_DTS2; break;
- case 2048 >> 5: ctx->data_type = IEC61937_DTS3; break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
- blocks << 5);
- return AVERROR(ENOSYS);
- }
-
- /* discard extraneous data by default */
- if (core_size && core_size < pkt->size) {
- ctx->out_bytes = core_size;
- ctx->length_code = core_size << 3;
- }
-
- ctx->pkt_offset = blocks << 7;
-
- if (ctx->out_bytes == ctx->pkt_offset) {
- /* The DTS stream fits exactly into the output stream, so skip the
- * preamble as it would not fit in there. This is the case for dts
- * discs and dts-in-wav. */
- ctx->use_preamble = 0;
- } else if (ctx->out_bytes > ctx->pkt_offset - BURST_HEADER_SIZE) {
- avpriv_request_sample(s, "Unrecognized large DTS frame");
- /* This will fail with a "bitrate too high" in the caller */
- }
-
- return 0;
-}
-
-static const enum IEC61937DataType mpeg_data_type[2][3] = {
- // LAYER1 LAYER2 LAYER3
- { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF },//MPEG2 LSF
- { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, //MPEG1
-};
-
-static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- int version = (pkt->data[1] >> 3) & 3;
- int layer = 3 - ((pkt->data[1] >> 1) & 3);
- int extension = pkt->data[2] & 1;
-
- if (layer == 3 || version == 1) {
- av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
- return AVERROR_INVALIDDATA;
- }
- av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
- if (version == 2 && extension) {
- ctx->data_type = IEC61937_MPEG2_EXT;
- ctx->pkt_offset = 4608;
- } else {
- ctx->data_type = mpeg_data_type [version & 1][layer];
- ctx->pkt_offset = spdif_mpeg_pkt_offset[version & 1][layer];
- }
- // TODO Data type dependent info (normal/karaoke, dynamic range control)
- return 0;
-}
-
-static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- AACADTSHeaderInfo hdr;
- GetBitContext gbc;
- int ret;
-
- init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
- ret = avpriv_aac_parse_header(&gbc, &hdr);
- if (ret < 0) {
- av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
- return AVERROR_INVALIDDATA;
- }
-
- ctx->pkt_offset = hdr.samples << 2;
- switch (hdr.num_aac_frames) {
- case 1:
- ctx->data_type = IEC61937_MPEG2_AAC;
- break;
- case 2:
- ctx->data_type = IEC61937_MPEG2_AAC_LSF_2048;
- break;
- case 4:
- ctx->data_type = IEC61937_MPEG2_AAC_LSF_4096;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
- hdr.samples);
- return AVERROR(EINVAL);
- }
- //TODO Data type dependent info (LC profile/SBR)
- return 0;
-}
-
-
-/*
- * It seems Dolby TrueHD frames have to be encapsulated in MAT frames before
- * they can be encapsulated in IEC 61937.
- * Here we encapsulate 24 TrueHD frames in a single MAT frame, padding them
- * to achieve constant rate.
- * The actual format of a MAT frame is unknown, but the below seems to work.
- * However, it seems it is not actually necessary for the 24 TrueHD frames to
- * be in an exact alignment with the MAT frame.
- */
-#define MAT_FRAME_SIZE 61424
-#define TRUEHD_FRAME_OFFSET 2560
-#define MAT_MIDDLE_CODE_OFFSET -4
-
-static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- int mat_code_length = 0;
- static const char mat_end_code[16] = { 0xC3, 0xC2, 0xC0, 0xC4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x97, 0x11 };
-
- if (!ctx->hd_buf_count) {
- static const char mat_start_code[20] = { 0x07, 0x9E, 0x00, 0x03, 0x84, 0x01, 0x01, 0x01, 0x80, 0x00, 0x56, 0xA5, 0x3B, 0xF4, 0x81, 0x83, 0x49, 0x80, 0x77, 0xE0 };
- mat_code_length = sizeof(mat_start_code) + BURST_HEADER_SIZE;
- memcpy(ctx->hd_buf, mat_start_code, sizeof(mat_start_code));
-
- } else if (ctx->hd_buf_count == 12) {
- static const char mat_middle_code[12] = { 0xC3, 0xC1, 0x42, 0x49, 0x3B, 0xFA, 0x82, 0x83, 0x49, 0x80, 0x77, 0xE0 };
- mat_code_length = sizeof(mat_middle_code) + MAT_MIDDLE_CODE_OFFSET;
- memcpy(&ctx->hd_buf[12 * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + MAT_MIDDLE_CODE_OFFSET],
- mat_middle_code, sizeof(mat_middle_code));
- }
-
- if (pkt->size > TRUEHD_FRAME_OFFSET - mat_code_length) {
- /* if such frames exist, we'd need some more complex logic to
- * distribute the TrueHD frames in the MAT frame */
- avpriv_request_sample(s, "Too large TrueHD frame of %d bytes",
- pkt->size);
- return AVERROR_PATCHWELCOME;
- }
-
- memcpy(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length],
- pkt->data, pkt->size);
- memset(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length + pkt->size],
- 0, TRUEHD_FRAME_OFFSET - pkt->size - mat_code_length);
-
- if (++ctx->hd_buf_count < 24){
- ctx->pkt_offset = 0;
- return 0;
- }
- memcpy(&ctx->hd_buf[MAT_FRAME_SIZE - sizeof(mat_end_code)], mat_end_code, sizeof(mat_end_code));
- ctx->hd_buf_count = 0;
-
- ctx->data_type = IEC61937_TRUEHD;
- ctx->pkt_offset = 61440;
- ctx->out_buf = ctx->hd_buf;
- ctx->out_bytes = MAT_FRAME_SIZE;
- ctx->length_code = MAT_FRAME_SIZE;
- return 0;
-}
-
-static int spdif_write_header(AVFormatContext *s)
-{
- IEC61937Context *ctx = s->priv_data;
-
- switch (s->streams[0]->codec->codec_id) {
- case AV_CODEC_ID_AC3:
- ctx->header_info = spdif_header_ac3;
- break;
- case AV_CODEC_ID_EAC3:
- ctx->header_info = spdif_header_eac3;
- break;
- case AV_CODEC_ID_MP1:
- case AV_CODEC_ID_MP2:
- case AV_CODEC_ID_MP3:
- ctx->header_info = spdif_header_mpeg;
- break;
- case AV_CODEC_ID_DTS:
- ctx->header_info = spdif_header_dts;
- break;
- case AV_CODEC_ID_AAC:
- ctx->header_info = spdif_header_aac;
- break;
- case AV_CODEC_ID_TRUEHD:
- ctx->header_info = spdif_header_truehd;
- ctx->hd_buf = av_malloc(MAT_FRAME_SIZE);
- if (!ctx->hd_buf)
- return AVERROR(ENOMEM);
- break;
- default:
- av_log(s, AV_LOG_ERROR, "codec not supported\n");
- return AVERROR_PATCHWELCOME;
- }
- return 0;
-}
-
-static int spdif_write_trailer(AVFormatContext *s)
-{
- IEC61937Context *ctx = s->priv_data;
- av_freep(&ctx->buffer);
- av_freep(&ctx->hd_buf);
- return 0;
-}
-
-static av_always_inline void spdif_put_16(IEC61937Context *ctx,
- AVIOContext *pb, unsigned int val)
-{
- if (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)
- avio_wb16(pb, val);
- else
- avio_wl16(pb, val);
-}
-
-static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
-{
- IEC61937Context *ctx = s->priv_data;
- int ret, padding;
-
- ctx->out_buf = pkt->data;
- ctx->out_bytes = pkt->size;
- ctx->length_code = FFALIGN(pkt->size, 2) << 3;
- ctx->use_preamble = 1;
- ctx->extra_bswap = 0;
-
- ret = ctx->header_info(s, pkt);
- if (ret < 0)
- return ret;
- if (!ctx->pkt_offset)
- return 0;
-
- padding = (ctx->pkt_offset - ctx->use_preamble * BURST_HEADER_SIZE - ctx->out_bytes) & ~1;
- if (padding < 0) {
- av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
- return AVERROR(EINVAL);
- }
-
- if (ctx->use_preamble) {
- spdif_put_16(ctx, s->pb, SYNCWORD1); //Pa
- spdif_put_16(ctx, s->pb, SYNCWORD2); //Pb
- spdif_put_16(ctx, s->pb, ctx->data_type); //Pc
- spdif_put_16(ctx, s->pb, ctx->length_code);//Pd
- }
-
- if (ctx->extra_bswap ^ (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)) {
- avio_write(s->pb, ctx->out_buf, ctx->out_bytes & ~1);
- } else {
- av_fast_malloc(&ctx->buffer, &ctx->buffer_size, ctx->out_bytes + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!ctx->buffer)
- return AVERROR(ENOMEM);
- ff_spdif_bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)ctx->out_buf, ctx->out_bytes >> 1);
- avio_write(s->pb, ctx->buffer, ctx->out_bytes & ~1);
- }
-
- /* a final lone byte has to be MSB aligned */
- if (ctx->out_bytes & 1)
- spdif_put_16(ctx, s->pb, ctx->out_buf[ctx->out_bytes - 1] << 8);
-
- ffio_fill(s->pb, 0, padding);
-
- av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
- ctx->data_type, ctx->out_bytes, ctx->pkt_offset);
-
- return 0;
-}
-
-AVOutputFormat ff_spdif_muxer = {
- .name = "spdif",
- .long_name = NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
- .extensions = "spdif",
- .priv_data_size = sizeof(IEC61937Context),
- .audio_codec = AV_CODEC_ID_AC3,
- .video_codec = AV_CODEC_ID_NONE,
- .write_header = spdif_write_header,
- .write_packet = spdif_write_packet,
- .write_trailer = spdif_write_trailer,
- .flags = AVFMT_NOTIMESTAMPS,
- .priv_class = &spdif_class,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 15:50:50 +0000