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Diffstat (limited to 'ffmpeg/libavformat/astenc.c')
-rw-r--r--ffmpeg/libavformat/astenc.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/ffmpeg/libavformat/astenc.c b/ffmpeg/libavformat/astenc.c
deleted file mode 100644
index edd802c..0000000
--- a/ffmpeg/libavformat/astenc.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * AST muxer
- * Copyright (c) 2012 James Almer
- *
- * 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 "avformat.h"
-#include "avio_internal.h"
-#include "internal.h"
-#include "ast.h"
-#include "libavutil/mathematics.h"
-#include "libavutil/opt.h"
-
-typedef struct ASTMuxContext {
- AVClass *class;
- int64_t size;
- int64_t samples;
- int64_t loopstart;
- int64_t loopend;
- int fbs;
-} ASTMuxContext;
-
-#define CHECK_LOOP(type) \
- if (ast->loop ## type > 0) { \
- ast->loop ## type = av_rescale_rnd(ast->loop ## type, enc->sample_rate, 1000, AV_ROUND_DOWN); \
- if (ast->loop ## type < 0 || ast->loop ## type > UINT_MAX) { \
- av_log(s, AV_LOG_ERROR, "Invalid loop" #type " value\n"); \
- return AVERROR(EINVAL); \
- } \
- }
-
-static int ast_write_header(AVFormatContext *s)
-{
- ASTMuxContext *ast = s->priv_data;
- AVIOContext *pb = s->pb;
- AVCodecContext *enc;
- unsigned int codec_tag;
-
- if (s->nb_streams == 1) {
- enc = s->streams[0]->codec;
- } else {
- av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
- return AVERROR(EINVAL);
- }
-
- if (enc->codec_id == AV_CODEC_ID_ADPCM_AFC) {
- av_log(s, AV_LOG_ERROR, "muxing ADPCM AFC is not implemented\n");
- return AVERROR_PATCHWELCOME;
- }
-
- codec_tag = ff_codec_get_tag(ff_codec_ast_tags, enc->codec_id);
- if (!codec_tag) {
- av_log(s, AV_LOG_ERROR, "unsupported codec\n");
- return AVERROR(EINVAL);
- }
-
- if (ast->loopend > 0 && ast->loopstart >= ast->loopend) {
- av_log(s, AV_LOG_ERROR, "loopend can't be less or equal to loopstart\n");
- return AVERROR(EINVAL);
- }
-
- /* Convert milliseconds to samples */
- CHECK_LOOP(start)
- CHECK_LOOP(end)
-
- ffio_wfourcc(pb, "STRM");
-
- ast->size = avio_tell(pb);
- avio_wb32(pb, 0); /* File size minus header */
- avio_wb16(pb, codec_tag);
- avio_wb16(pb, 16); /* Bit depth */
- avio_wb16(pb, enc->channels);
- avio_wb16(pb, 0); /* Loop flag */
- avio_wb32(pb, enc->sample_rate);
-
- ast->samples = avio_tell(pb);
- avio_wb32(pb, 0); /* Number of samples */
- avio_wb32(pb, 0); /* Loopstart */
- avio_wb32(pb, 0); /* Loopend */
- avio_wb32(pb, 0); /* Size of first block */
-
- /* Unknown */
- avio_wb32(pb, 0);
- avio_wl32(pb, 0x7F);
- avio_wb64(pb, 0);
- avio_wb64(pb, 0);
- avio_wb32(pb, 0);
-
- avio_flush(pb);
-
- return 0;
-}
-
-static int ast_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- AVIOContext *pb = s->pb;
- ASTMuxContext *ast = s->priv_data;
- AVCodecContext *enc = s->streams[0]->codec;
- int size = pkt->size / enc->channels;
-
- if (enc->frame_number == 1)
- ast->fbs = size;
-
- ffio_wfourcc(pb, "BLCK");
- avio_wb32(pb, size); /* Block size */
-
- /* padding */
- avio_wb64(pb, 0);
- avio_wb64(pb, 0);
- avio_wb64(pb, 0);
-
- avio_write(pb, pkt->data, pkt->size);
-
- return 0;
-}
-
-static int ast_write_trailer(AVFormatContext *s)
-{
- AVIOContext *pb = s->pb;
- ASTMuxContext *ast = s->priv_data;
- AVCodecContext *enc = s->streams[0]->codec;
- int64_t file_size = avio_tell(pb);
- int64_t samples = (file_size - 64 - (32 * enc->frame_number)) / enc->block_align; /* PCM_S16BE_PLANAR */
-
- av_log(s, AV_LOG_DEBUG, "total samples: %"PRId64"\n", samples);
-
- if (s->pb->seekable) {
- /* Number of samples */
- avio_seek(pb, ast->samples, SEEK_SET);
- avio_wb32(pb, samples);
-
- /* Loopstart if provided */
- if (ast->loopstart > 0) {
- if (ast->loopstart >= samples) {
- av_log(s, AV_LOG_WARNING, "Loopstart value is out of range and will be ignored\n");
- ast->loopstart = -1;
- avio_skip(pb, 4);
- } else
- avio_wb32(pb, ast->loopstart);
- } else
- avio_skip(pb, 4);
-
- /* Loopend if provided. Otherwise number of samples again */
- if (ast->loopend && ast->loopstart >= 0) {
- if (ast->loopend > samples) {
- av_log(s, AV_LOG_WARNING, "Loopend value is out of range and will be ignored\n");
- ast->loopend = samples;
- }
- avio_wb32(pb, ast->loopend);
- } else {
- avio_wb32(pb, samples);
- }
-
- /* Size of first block */
- avio_wb32(pb, ast->fbs);
-
- /* File size minus header */
- avio_seek(pb, ast->size, SEEK_SET);
- avio_wb32(pb, file_size - 64);
-
- /* Loop flag */
- if (ast->loopstart >= 0) {
- avio_skip(pb, 6);
- avio_wb16(pb, 0xFFFF);
- }
-
- avio_seek(pb, file_size, SEEK_SET);
- avio_flush(pb);
- }
- return 0;
-}
-
-#define OFFSET(obj) offsetof(ASTMuxContext, obj)
-static const AVOption options[] = {
- { "loopstart", "Loopstart position in milliseconds.", OFFSET(loopstart), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
- { "loopend", "Loopend position in milliseconds.", OFFSET(loopend), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
- { NULL },
-};
-
-static const AVClass ast_muxer_class = {
- .class_name = "AST muxer",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-AVOutputFormat ff_ast_muxer = {
- .name = "ast",
- .long_name = NULL_IF_CONFIG_SMALL("AST (Audio Stream)"),
- .extensions = "ast",
- .priv_data_size = sizeof(ASTMuxContext),
- .audio_codec = AV_CODEC_ID_PCM_S16BE_PLANAR,
- .video_codec = AV_CODEC_ID_NONE,
- .write_header = ast_write_header,
- .write_packet = ast_write_packet,
- .write_trailer = ast_write_trailer,
- .priv_class = &ast_muxer_class,
- .codec_tag = (const AVCodecTag* const []){ff_codec_ast_tags, 0},
-};
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