/
reframe_rawpcm.c
486 lines (430 loc) · 14.5 KB
/
reframe_rawpcm.c
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/*
* GPAC - Multimedia Framework C SDK
*
* Authors: Jean Le Feuvre
* Copyright (c) Telecom ParisTech 2018-2022
* All rights reserved
*
* This file is part of GPAC / RAW PCM reframer filter
*
* GPAC 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, or (at your option)
* any later version.
*
* GPAC 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 this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <gpac/avparse.h>
#include <gpac/constants.h>
#include <gpac/filters.h>
typedef struct
{
//opts
u32 framelen, safmt, sr, ch;
//only one input pid declared
GF_FilterPid *ipid;
//only one output pid declared
GF_FilterPid *opid;
Bool file_loaded, is_playing, initial_play_done;
u64 cts;
u32 frame_size, nb_bytes_in_frame, Bps;
u64 filepos, total_frames;
GF_FilterPacket *out_pck;
u8 *out_data;
Bool reverse_play, done;
u32 probe_wave, wav_hdr_size;
u8 *probe_data;
u32 probe_data_size;
} GF_PCMReframeCtx;
GF_Err pcmreframe_configure_pid(GF_Filter *filter, GF_FilterPid *pid, Bool is_remove)
{
const GF_PropertyValue *p;
GF_PCMReframeCtx *ctx = gf_filter_get_udta(filter);
if (is_remove) {
ctx->ipid = NULL;
if (ctx->opid) {
gf_filter_pid_remove(ctx->opid);
ctx->opid = NULL;
}
return GF_OK;
}
if (! gf_filter_pid_check_caps(pid))
return GF_NOT_SUPPORTED;
ctx->ipid = pid;
p = gf_filter_pid_get_property(ctx->ipid, GF_PROP_PID_FILE_EXT);
if (!ctx->safmt) {
if (p && p->value.string) ctx->safmt = gf_audio_fmt_parse(p->value.string);
}
if (!ctx->safmt) {
ctx->probe_wave = 1;
GF_FilterEvent evt;
GF_FEVT_INIT(evt, GF_FEVT_PLAY, pid);
gf_filter_pid_send_event(pid, &evt);
return GF_OK;
} else {
if (!ctx->sr) {
GF_LOG(GF_LOG_ERROR, GF_LOG_MEDIA, ("[PCMReframe] Missing audio sample rate, cannot parse\n"));
return GF_BAD_PARAM;
}
if (!ctx->ch) {
GF_LOG(GF_LOG_ERROR, GF_LOG_MEDIA, ("[PCMReframe] Missing audio ch, cannot parse\n"));
return GF_BAD_PARAM;
}
ctx->Bps = gf_audio_fmt_bit_depth(ctx->safmt) / 8;
}
if (!ctx->framelen) {
GF_LOG(GF_LOG_WARNING, GF_LOG_MEDIA, ("[PCMReframe] Missing audio framelen, using 1024\n"));
ctx->framelen = 1024;
}
ctx->frame_size = ctx->framelen * ctx->Bps * ctx->ch;
if (!ctx->opid)
ctx->opid = gf_filter_pid_new(filter);
gf_filter_pid_copy_properties(ctx->opid, ctx->ipid);
gf_filter_pid_set_framing_mode(ctx->ipid, GF_FALSE);
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_STREAM_TYPE, &PROP_UINT(GF_STREAM_AUDIO));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_CODECID, &PROP_UINT(GF_CODECID_RAW));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_SAMPLE_RATE, &PROP_UINT(ctx->sr));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_NUM_CHANNELS, &PROP_UINT(ctx->ch));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_SAMPLES_PER_FRAME, &PROP_UINT(ctx->framelen));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_AUDIO_FORMAT, &PROP_UINT(ctx->safmt));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_TIMESCALE, &PROP_UINT(ctx->sr));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_PLAYBACK_MODE, &PROP_UINT(GF_PLAYBACK_MODE_REWIND));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_CAN_DATAREF, &PROP_BOOL(GF_TRUE));
p = gf_filter_pid_get_property(ctx->ipid, GF_PROP_PID_FILE_CACHED);
if (p && p->value.boolean) ctx->file_loaded = GF_TRUE;
if (!gf_sys_is_test_mode() ) {
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_BITRATE, & PROP_UINT(ctx->sr * ctx->Bps * ctx->ch));
}
p = gf_filter_pid_get_property(ctx->ipid, GF_PROP_PID_DOWN_SIZE);
if (p && p->value.longuint) {
u64 nb_frames = p->value.longuint;
if (ctx->probe_wave) nb_frames -= ctx->wav_hdr_size;
nb_frames /= ctx->Bps * ctx->ch;
ctx->total_frames = p->value.longuint;
ctx->total_frames /= ctx->frame_size;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DURATION, &PROP_FRAC64_INT(nb_frames, ctx->sr));
}
return GF_OK;
}
static Bool pcmreframe_process_event(GF_Filter *filter, const GF_FilterEvent *evt)
{
u32 nb_frames;
GF_FilterEvent fevt;
GF_PCMReframeCtx *ctx = gf_filter_get_udta(filter);
switch (evt->base.type) {
case GF_FEVT_PLAY:
if (!ctx->is_playing) {
ctx->is_playing = GF_TRUE;
ctx->cts = 0;
}
ctx->done = GF_FALSE;
if (!ctx->total_frames)
return GF_TRUE;
if (evt->play.start_range>=0) {
ctx->cts = (u64) (evt->play.start_range * ctx->sr);
} else {
ctx->cts = (ctx->total_frames-1) * ctx->framelen;
}
nb_frames = (u32) (ctx->cts / ctx->framelen);
if (nb_frames==ctx->total_frames) {
if (evt->play.speed>=0) {
ctx->done = GF_TRUE;
return GF_TRUE;
}
nb_frames--;
ctx->cts = nb_frames * ctx->framelen;
}
ctx->filepos = nb_frames * ctx->frame_size;
ctx->reverse_play = (evt->play.speed<0) ? GF_TRUE : GF_FALSE;
if (!ctx->initial_play_done) {
ctx->initial_play_done = GF_TRUE;
//seek will not change the current source state, don't send a seek
if (!ctx->filepos)
return GF_TRUE;
}
//post a seek
GF_FEVT_INIT(fevt, GF_FEVT_SOURCE_SEEK, ctx->ipid);
fevt.seek.start_offset = ctx->filepos + ctx->wav_hdr_size;
gf_filter_pid_send_event(ctx->ipid, &fevt);
//cancel event
return GF_TRUE;
case GF_FEVT_STOP:
//don't cancel event
ctx->is_playing = GF_FALSE;
if (ctx->out_pck) {
gf_filter_pck_discard(ctx->out_pck);
ctx->out_pck = NULL;
}
return GF_FALSE;
case GF_FEVT_SET_SPEED:
//cancel event
return GF_TRUE;
default:
break;
}
//by default don't cancel event - to rework once we have downloading in place
return GF_FALSE;
}
void pcmreframe_flush_packet(GF_PCMReframeCtx *ctx)
{
if (ctx->reverse_play) {
u32 i, nb_bytes_in_sample, nb_samples = ctx->nb_bytes_in_frame / ctx->Bps / ctx->ch;
nb_bytes_in_sample = ctx->Bps * ctx->ch;
for (i=0; i<nb_samples/2; i++) {
char store[100];
memcpy(store, ctx->out_data + i*nb_bytes_in_sample, nb_bytes_in_sample);
memcpy(ctx->out_data + i*nb_bytes_in_sample, ctx->out_data + (nb_samples - i - 1)*nb_bytes_in_sample, nb_bytes_in_sample);
memcpy(ctx->out_data + (nb_samples-i-1)*nb_bytes_in_sample, store, nb_bytes_in_sample);
}
}
gf_filter_pck_send(ctx->out_pck);
ctx->out_pck = NULL;
}
GF_Err pcmreframe_process(GF_Filter *filter)
{
GF_PCMReframeCtx *ctx = gf_filter_get_udta(filter);
GF_FilterPacket *pck;
u64 byte_offset;
u8 *data;
u32 pck_size;
if (ctx->done) return GF_EOS;
if (!ctx->is_playing && ctx->opid) return GF_OK;
pck = gf_filter_pid_get_packet(ctx->ipid);
if (!pck) {
if (gf_filter_pid_is_eos(ctx->ipid) && !ctx->reverse_play) {
if (ctx->out_pck) {
gf_filter_pck_truncate(ctx->out_pck, ctx->nb_bytes_in_frame);
gf_filter_pck_set_duration(ctx->out_pck, ctx->nb_bytes_in_frame/ctx->Bps/ctx->ch);
pcmreframe_flush_packet(ctx);
}
if (ctx->opid)
gf_filter_pid_set_eos(ctx->opid);
return GF_EOS;
}
return GF_OK;
}
data = (char *) gf_filter_pck_get_data(pck, &pck_size);
byte_offset = gf_filter_pck_get_byte_offset(pck);
if (ctx->probe_wave==1) {
Bool wav_ok = GF_TRUE;
Bool hdr_found = GF_FALSE;
GF_BitStream *bs;
if (ctx->probe_data) {
ctx->probe_data = gf_realloc(ctx->probe_data, ctx->probe_data_size+pck_size);
memcpy(ctx->probe_data + ctx->probe_data_size, data, pck_size);
ctx->probe_data_size += pck_size;
bs = gf_bs_new(ctx->probe_data, ctx->probe_data_size, GF_BITSTREAM_READ);
} else {
bs = gf_bs_new(data, pck_size, GF_BITSTREAM_READ);
}
u32 type = gf_bs_read_u32(bs);
if (type!=GF_4CC('R', 'I', 'F', 'F')) {
wav_ok = GF_FALSE;
}
gf_bs_read_u32(bs);
u32 wtype = gf_bs_read_u32(bs);
if (wtype!=GF_4CC('W', 'A', 'V', 'E')) {
wav_ok = GF_FALSE;
}
while (gf_bs_available(bs)) {
type = gf_bs_read_u32(bs);
u32 csize = gf_bs_read_u32_le(bs); //subchunk size
if (type==GF_4CC('d', 'a', 't', 'a')) {
break;
}
if (type!=GF_4CC('f', 'm', 't', ' ')) {
gf_bs_skip_bytes(bs, csize);
continue;
}
//parse fmt
hdr_found = GF_TRUE;
u16 atype = gf_bs_read_u16_le(bs);
ctx->ch = gf_bs_read_u16_le(bs);
ctx->sr = gf_bs_read_u32_le(bs);
gf_bs_read_u32_le(bs); //byte rate
gf_bs_read_u16_le(bs); // block align
u32 bps = gf_bs_read_u16_le(bs);
if (atype==3) {
if (bps==32) {
ctx->safmt = GF_AUDIO_FMT_FLT;
} else {
wav_ok = GF_FALSE;
}
} else if (atype==1) {
if (bps==32) {
ctx->safmt = GF_AUDIO_FMT_S32;
} else if (bps==24) {
ctx->safmt = GF_AUDIO_FMT_S24;
} else if (bps==16) {
ctx->safmt = GF_AUDIO_FMT_S16;
} else if (bps==8) {
ctx->safmt = GF_AUDIO_FMT_U8;
} else {
wav_ok = GF_FALSE;
}
}
}
if (gf_bs_is_overflow(bs)) {
if (!ctx->probe_data) {
ctx->probe_data = gf_malloc(pck_size);
memcpy(ctx->probe_data, data, pck_size);
ctx->probe_data_size = pck_size;
}
if (!hdr_found) {
if (ctx->probe_data_size<=10000) {
gf_filter_pid_drop_packet(ctx->ipid);
return GF_OK;
}
GF_LOG(GF_LOG_WARNING, GF_LOG_MEDIA, ("[PCMReframe] Cannot find wave data chunk after %d bytes, aborting\n", ctx->probe_data_size));
}
wav_ok = GF_FALSE;
}
ctx->wav_hdr_size = (u32) gf_bs_get_position(bs);
gf_bs_del(bs);
if (!wav_ok) {
gf_filter_pid_drop_packet(ctx->ipid);
if (ctx->opid)
gf_filter_pid_set_eos(ctx->opid);
gf_filter_pid_set_discard(ctx->ipid, GF_TRUE);
GF_LOG(GF_LOG_ERROR, GF_LOG_MEDIA, ("[PCMReframe] Invalid or unsupported WAVE header, aborting\n", ctx->probe_data_size));
return GF_NON_COMPLIANT_BITSTREAM;
}
ctx->probe_wave = 2;
pcmreframe_configure_pid(filter, ctx->ipid, GF_FALSE);
if (ctx->probe_data) {
pck_size = ctx->probe_data_size;
data = ctx->probe_data;
}
pck_size -= ctx->wav_hdr_size;
data+=ctx->wav_hdr_size;
byte_offset = 0;
}
byte_offset+= ctx->wav_hdr_size;
while (pck_size) {
if (!ctx->out_pck) {
ctx->out_pck = gf_filter_pck_new_alloc(ctx->opid, ctx->frame_size, &ctx->out_data);
if (!ctx->out_pck) return GF_OUT_OF_MEM;
gf_filter_pck_set_cts(ctx->out_pck, ctx->cts);
gf_filter_pck_set_sap(ctx->out_pck, GF_FILTER_SAP_1);
gf_filter_pck_set_duration(ctx->out_pck, ctx->framelen);
gf_filter_pck_set_byte_offset(ctx->out_pck, byte_offset);
}
if (pck_size + ctx->nb_bytes_in_frame < ctx->frame_size) {
memcpy(ctx->out_data + ctx->nb_bytes_in_frame, data, pck_size);
ctx->nb_bytes_in_frame += pck_size;
pck_size = 0;
} else {
u32 remain = ctx->frame_size - ctx->nb_bytes_in_frame;
memcpy(ctx->out_data + ctx->nb_bytes_in_frame, data, remain);
ctx->nb_bytes_in_frame = ctx->frame_size;
pcmreframe_flush_packet(ctx);
pck_size -= remain;
data += remain;
byte_offset += remain;
ctx->out_pck = NULL;
ctx->nb_bytes_in_frame = 0;
//reverse playback, the remaining data is for the next frame, we want the previous one.
//Trash packet and seek to previous frame
if (ctx->reverse_play) {
GF_FilterEvent fevt;
if (!ctx->cts) {
if (ctx->opid)
gf_filter_pid_set_eos(ctx->opid);
GF_FEVT_INIT(fevt, GF_FEVT_STOP, ctx->ipid);
gf_filter_pid_send_event(ctx->ipid, &fevt);
ctx->done = GF_TRUE;
return GF_EOS;
}
ctx->cts -= ctx->framelen;
ctx->filepos -= ctx->frame_size;
gf_filter_pid_drop_packet(ctx->ipid);
//post a seek, this will trash remaining packets in buffers
GF_FEVT_INIT(fevt, GF_FEVT_SOURCE_SEEK, ctx->ipid);
fevt.seek.start_offset = ctx->filepos + ctx->wav_hdr_size;
gf_filter_pid_send_event(ctx->ipid, &fevt);
return GF_OK;
}
ctx->cts += ctx->framelen;
}
}
gf_filter_pid_drop_packet(ctx->ipid);
if (ctx->probe_data) {
gf_free(ctx->probe_data);
ctx->probe_data = NULL;
ctx->probe_data_size = 0;
}
return GF_OK;
}
static const char *pcmreframe_probe_data(const u8 *data, u32 size, GF_FilterProbeScore *score)
{
if (size<20) return NULL;
GF_BitStream *bs = gf_bs_new(data, size, GF_BITSTREAM_READ);
u32 code = gf_bs_read_u32(bs);
if (code == GF_4CC('R', 'I', 'F', 'F')) {
gf_bs_read_u32(bs);
code = gf_bs_read_u32(bs);
if (code == GF_4CC('W', 'A', 'V', 'E')) {
*score = GF_FPROBE_SUPPORTED;
gf_bs_del(bs);
return "audio/wav";
}
}
gf_bs_del(bs);
*score = GF_FPROBE_EXT_MATCH;
return gf_audio_fmt_all_shortnames();
}
static void pcmreframe_finalize(GF_Filter *filter)
{
GF_PCMReframeCtx *ctx = gf_filter_get_udta(filter);
if (ctx->out_pck) gf_filter_pck_discard(ctx->out_pck);
if (ctx->probe_data) gf_free(ctx->probe_data);
}
static GF_FilterCapability PCMReframeCaps[] =
{
CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_FILE),
CAP_STRING(GF_CAPS_INPUT, GF_PROP_PID_FILE_EXT, "pcm"),
CAP_STRING(GF_CAPS_INPUT, GF_PROP_PID_MIME, "audio/x-pcm"),
CAP_UINT(GF_CAPS_OUTPUT_STATIC, GF_PROP_PID_STREAM_TYPE, GF_STREAM_AUDIO),
CAP_UINT(GF_CAPS_OUTPUT_STATIC, GF_PROP_PID_CODECID, GF_CODECID_RAW),
CAP_BOOL(GF_CAPS_OUTPUT_STATIC_EXCLUDED, GF_PROP_PID_UNFRAMED, GF_TRUE),
{0},
CAP_UINT(GF_CAPS_INPUT, GF_PROP_PID_STREAM_TYPE, GF_STREAM_FILE),
CAP_STRING(GF_CAPS_INPUT, GF_PROP_PID_FILE_EXT, "wav"),
CAP_STRING(GF_CAPS_INPUT, GF_PROP_PID_MIME, "audio/wav"),
};
#define OFFS(_n) #_n, offsetof(GF_PCMReframeCtx, _n)
static GF_FilterArgs PCMReframeArgs[] =
{
{ OFFS(sr), "sample rate", GF_PROP_UINT, "44100", NULL, 0},
{ OFFS(safmt), "audio format", GF_PROP_PCMFMT, "none", NULL, 0},
{ OFFS(ch), "number of channels", GF_PROP_UINT, "2", NULL, 0},
{ OFFS(framelen), "number of samples to put in one audio frame. For planar formats, indicate plane size in samples", GF_PROP_UINT, "1024", NULL, GF_FS_ARG_HINT_ADVANCED},
{0}
};
GF_FilterRegister PCMReframeRegister = {
.name = "rfpcm",
GF_FS_SET_DESCRIPTION("PCM reframer")
GF_FS_SET_HELP("This filter parses raw PCM file/data or WAVE files and outputs corresponding raw audio PID and frames.")
.private_size = sizeof(GF_PCMReframeCtx),
.args = PCMReframeArgs,
SETCAPS(PCMReframeCaps),
.finalize = pcmreframe_finalize,
.configure_pid = pcmreframe_configure_pid,
.process = pcmreframe_process,
.process_event = pcmreframe_process_event,
.probe_data = pcmreframe_probe_data
};
const GF_FilterRegister *pcmreframe_register(GF_FilterSession *session)
{
PCMReframeArgs[1].min_max_enum = gf_audio_fmt_all_names();
PCMReframeCaps[1].val.value.string = (char *) gf_audio_fmt_all_shortnames();
return &PCMReframeRegister;
}