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https://github.com/FFmpeg/FFmpeg.git
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EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Georg Lippitsch
Michael Niedermayer
parent
723550d3ca
commit
e3b03da772
@ -8,6 +8,9 @@
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* WAV muxer RF64 support
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* Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
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*
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* EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
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* Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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@ -28,10 +31,13 @@
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#include <stdint.h>
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#include <string.h>
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#include "libavutil/avstring.h"
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#include "libavutil/dict.h"
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/time.h"
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#include "avformat.h"
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#include "avio.h"
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@ -43,6 +49,19 @@
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#define RF64_NEVER 0
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#define RF64_ALWAYS 1
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#define PEAK_BUFFER_SIZE 1024
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typedef enum {
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PEAK_OFF = 0,
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PEAK_ON,
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PEAK_ONLY
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} PeakType;
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typedef enum {
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PEAK_FORMAT_UINT8 = 1,
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PEAK_FORMAT_UINT16
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} PeakFormat;
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typedef struct WAVMuxContext {
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const AVClass *class;
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int64_t data;
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@ -50,9 +69,22 @@ typedef struct WAVMuxContext {
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int64_t ds64;
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int64_t minpts;
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int64_t maxpts;
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int16_t *peak_maxpos, *peak_maxneg;
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uint32_t peak_num_frames;
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uint32_t peak_outbuf_size;
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uint32_t peak_outbuf_bytes;
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uint32_t peak_pos_pop;
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uint16_t peak_pop;
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uint8_t *peak_output;
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int last_duration;
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int write_bext;
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int write_peak;
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int rf64;
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int peak_block_size;
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PeakFormat peak_format;
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int peak_block_pos;
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int peak_ppv;
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int peak_bps;
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} WAVMuxContext;
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#if CONFIG_WAV_MUXER
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@ -110,6 +142,162 @@ static void bwf_write_bext_chunk(AVFormatContext *s)
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ff_end_tag(s->pb, bext);
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}
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static av_cold void peak_free_buffers(AVFormatContext *s)
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{
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WAVMuxContext *wav = s->priv_data;
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av_freep(&wav->peak_maxpos);
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av_freep(&wav->peak_maxneg);
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av_freep(&wav->peak_output);
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}
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static av_cold int peak_init_writer(AVFormatContext *s)
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{
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WAVMuxContext *wav = s->priv_data;
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AVCodecContext *enc = s->streams[0]->codec;
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if (enc->codec_id != AV_CODEC_ID_PCM_S8 &&
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enc->codec_id != AV_CODEC_ID_PCM_S16LE &&
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enc->codec_id != AV_CODEC_ID_PCM_U8 &&
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enc->codec_id != AV_CODEC_ID_PCM_U16LE) {
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av_log(s, AV_LOG_ERROR, "%s codec not supported for Peak Chunk\n",
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s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
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return -1;
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}
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wav->peak_bps = av_get_bits_per_sample(enc->codec_id) / 8;
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if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
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av_log(s, AV_LOG_ERROR,
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"Writing 16 bit peak for 8 bit audio does not make sense\n");
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return -1;
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}
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wav->peak_maxpos = av_mallocz(enc->channels * sizeof(*wav->peak_maxpos));
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if (!wav->peak_maxpos)
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goto nomem;
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wav->peak_maxneg = av_mallocz(enc->channels * sizeof(*wav->peak_maxneg));
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if (!wav->peak_maxneg)
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goto nomem;
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wav->peak_output = av_malloc(PEAK_BUFFER_SIZE);
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if (!wav->peak_output)
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goto nomem;
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wav->peak_outbuf_size = PEAK_BUFFER_SIZE;
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return 0;
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nomem:
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av_log(s, AV_LOG_ERROR, "Out of memory\n");
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peak_free_buffers(s);
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return AVERROR(ENOMEM);
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}
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static void peak_write_frame(AVFormatContext *s)
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{
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WAVMuxContext *wav = s->priv_data;
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AVCodecContext *enc = s->streams[0]->codec;
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int peak_of_peaks;
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int c;
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if (!wav->peak_output)
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return;
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for (c = 0; c < enc->channels; c++) {
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wav->peak_maxneg[c] = -wav->peak_maxneg[c];
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if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
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wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
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wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
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}
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if (wav->peak_ppv == 1)
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wav->peak_maxpos[c] =
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FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
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peak_of_peaks = FFMAX3(wav->peak_maxpos[c], wav->peak_maxneg[c],
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wav->peak_pop);
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if (peak_of_peaks > wav->peak_pop)
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wav->peak_pos_pop = wav->peak_num_frames;
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wav->peak_pop = peak_of_peaks;
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if (wav->peak_outbuf_size - wav->peak_outbuf_bytes <
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wav->peak_format * wav->peak_ppv) {
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wav->peak_outbuf_size += PEAK_BUFFER_SIZE;
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wav->peak_output = av_realloc(wav->peak_output,
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wav->peak_outbuf_size);
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if (!wav->peak_output) {
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av_log(s, AV_LOG_ERROR, "No memory for peak data\n");
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return;
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}
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}
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if (wav->peak_format == PEAK_FORMAT_UINT8) {
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wav->peak_output[wav->peak_outbuf_bytes++] =
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wav->peak_maxpos[c];
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if (wav->peak_ppv == 2) {
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wav->peak_output[wav->peak_outbuf_bytes++] =
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wav->peak_maxneg[c];
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}
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} else {
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AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
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wav->peak_maxpos[c]);
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wav->peak_outbuf_bytes += 2;
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if (wav->peak_ppv == 2) {
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AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
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wav->peak_maxneg[c]);
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wav->peak_outbuf_bytes += 2;
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}
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}
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wav->peak_maxpos[c] = 0;
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wav->peak_maxneg[c] = 0;
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}
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wav->peak_num_frames++;
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}
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static void peak_write_chunk(AVFormatContext *s)
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{
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WAVMuxContext *wav = s->priv_data;
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AVIOContext *pb = s->pb;
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AVCodecContext *enc = s->streams[0]->codec;
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int64_t peak = ff_start_tag(s->pb, "levl");
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int64_t now0;
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time_t now_secs;
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char timestamp[28];
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/* Peak frame of incomplete block at end */
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if (wav->peak_block_pos)
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peak_write_frame(s);
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memset(timestamp, 0, 28);
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if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
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av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
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now0 = av_gettime();
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now_secs = now0 / 1000000;
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strftime(timestamp, 28, "%Y:%m:%d:%H:%M:%S:", localtime(&now_secs));
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av_strlcatf(timestamp, 28, "%03d", (int)((now0 / 1000) % 1000));
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}
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avio_wl32(pb, 1); /* version */
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avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */
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avio_wl32(pb, wav->peak_ppv); /* positive and negative */
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avio_wl32(pb, wav->peak_block_size); /* frames per value */
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avio_wl32(pb, enc->channels); /* number of channels */
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avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */
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avio_wl32(pb, wav->peak_pos_pop); /* audio sample frame index */
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avio_wl32(pb, 128); /* equal to size of header */
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avio_write(pb, timestamp, 28); /* ASCII time stamp */
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ffio_fill(pb, 0, 60);
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avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
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ff_end_tag(pb, peak);
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if (!wav->data)
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wav->data = peak;
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}
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static int wav_write_header(AVFormatContext *s)
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{
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WAVMuxContext *wav = s->priv_data;
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@ -139,6 +327,7 @@ static int wav_write_header(AVFormatContext *s)
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ffio_fill(pb, 0, 28);
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}
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if (wav->write_peak != 2) {
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/* format header */
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fmt = ff_start_tag(pb, "fmt ");
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if (ff_put_wav_header(pb, s->streams[0]->codec, 0) < 0) {
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@ -148,6 +337,7 @@ static int wav_write_header(AVFormatContext *s)
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return AVERROR(ENOSYS);
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}
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ff_end_tag(pb, fmt);
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}
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if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
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&& s->pb->seekable) {
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@ -159,15 +349,23 @@ static int wav_write_header(AVFormatContext *s)
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if (wav->write_bext)
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bwf_write_bext_chunk(s);
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if (wav->write_peak) {
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int ret;
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if ((ret = peak_init_writer(s)) < 0)
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return ret;
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}
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avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
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wav->maxpts = wav->last_duration = 0;
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wav->minpts = INT64_MAX;
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if (wav->write_peak != 2) {
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/* info header */
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ff_riff_write_info(s);
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/* data header */
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wav->data = ff_start_tag(pb, "data");
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}
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avio_flush(pb);
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@ -178,7 +376,31 @@ static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVIOContext *pb = s->pb;
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WAVMuxContext *wav = s->priv_data;
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if (wav->write_peak != 2)
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avio_write(pb, pkt->data, pkt->size);
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if (wav->write_peak) {
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int c = 0;
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int i;
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for (i = 0; i < pkt->size; i += wav->peak_bps) {
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if (wav->peak_bps == 1) {
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wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
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wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
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} else {
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wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
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wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
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}
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if (++c == s->streams[0]->codec->channels) {
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c = 0;
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if (++wav->peak_block_pos == wav->peak_block_size) {
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peak_write_frame(s);
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wav->peak_block_pos = 0;
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}
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}
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}
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}
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if(pkt->pts != AV_NOPTS_VALUE) {
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wav->minpts = FFMIN(wav->minpts, pkt->pts);
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wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
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@ -199,6 +421,16 @@ static int wav_write_trailer(AVFormatContext *s)
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avio_flush(pb);
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if (s->pb->seekable) {
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if (wav->write_peak != 2) {
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ff_end_tag(pb, wav->data);
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avio_flush(pb);
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}
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if (wav->write_peak && wav->peak_output) {
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peak_write_chunk(s);
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avio_flush(pb);
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}
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/* update file size */
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file_size = avio_tell(pb);
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data_size = file_size - wav->data;
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@ -209,7 +441,6 @@ static int wav_write_trailer(AVFormatContext *s)
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avio_wl32(pb, (uint32_t)(file_size - 8));
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avio_seek(pb, file_size, SEEK_SET);
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ff_end_tag(pb, wav->data);
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avio_flush(pb);
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}
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@ -253,6 +484,10 @@ static int wav_write_trailer(AVFormatContext *s)
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avio_flush(pb);
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}
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}
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if (wav->write_peak)
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peak_free_buffers(s);
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return 0;
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}
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@ -260,10 +495,17 @@ static int wav_write_trailer(AVFormatContext *s)
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
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{ "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
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{ "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" },
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{ "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" },
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{ "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
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{ "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
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{ "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
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{ "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
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{ "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
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{ "peak_block_size", "Number of audio samples used to generate each peak frame.", OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC },
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{ "peak_format", "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT, { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC },
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{ "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
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{ NULL },
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};
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