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review.jami.net / pjproject / ada412638c9d3c81e6f717916e78ae3dbefdb347 / . / pjmedia / src / pjmedia-codec / ffmpeg_codecs.c
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/* $Id$ */
/*
* Copyright (C) 2010 Teluu Inc. (http://www.teluu.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjmedia-codec/ffmpeg_codecs.h>
#include <pjmedia-codec/h263_packetizer.h>
#include <pjmedia/errno.h>
#include <pj/assert.h>
#include <pj/list.h>
#include <pj/log.h>
#include <pj/math.h>
#include <pj/pool.h>
#include <pj/string.h>
#include <pj/os.h>
/*
* Only build this file if PJMEDIA_HAS_FFMPEG_CODEC != 0
*/
#if defined(PJMEDIA_HAS_FFMPEG_CODEC) && PJMEDIA_HAS_FFMPEG_CODEC != 0
#define THIS_FILE "ffmpeg_codecs.c"
#include "../pjmedia/ffmpeg_util.h"
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#define PJMEDIA_FORMAT_FFMPEG_UNKNOWN PJMEDIA_FORMAT_PACK('f','f','0','0');
/* Prototypes for FFMPEG codecs factory */
static pj_status_t ffmpeg_test_alloc( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *id );
static pj_status_t ffmpeg_default_attr( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *info,
pjmedia_vid_codec_param *attr );
static pj_status_t ffmpeg_enum_codecs( pjmedia_vid_codec_factory *factory,
unsigned *count,
pjmedia_vid_codec_info codecs[]);
static pj_status_t ffmpeg_alloc_codec( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *info,
pjmedia_vid_codec **p_codec);
static pj_status_t ffmpeg_dealloc_codec( pjmedia_vid_codec_factory *factory,
pjmedia_vid_codec *codec );
/* Prototypes for FFMPEG codecs implementation. */
static pj_status_t ffmpeg_codec_init( pjmedia_vid_codec *codec,
pj_pool_t *pool );
static pj_status_t ffmpeg_codec_open( pjmedia_vid_codec *codec,
pjmedia_vid_codec_param *attr );
static pj_status_t ffmpeg_codec_close( pjmedia_vid_codec *codec );
static pj_status_t ffmpeg_codec_modify(pjmedia_vid_codec *codec,
const pjmedia_vid_codec_param *attr );
static pj_status_t ffmpeg_codec_get_param(pjmedia_vid_codec *codec,
pjmedia_vid_codec_param *param);
static pj_status_t ffmpeg_packetize ( pjmedia_vid_codec *codec,
pj_uint8_t *buf,
pj_size_t buf_len,
unsigned *pos,
const pj_uint8_t **payload,
pj_size_t *payload_len);
static pj_status_t ffmpeg_unpacketize(pjmedia_vid_codec *codec,
const pj_uint8_t *payload,
pj_size_t payload_len,
pj_uint8_t *buf,
pj_size_t *buf_len);
static pj_status_t ffmpeg_codec_encode( pjmedia_vid_codec *codec,
const pjmedia_frame *input,
unsigned output_buf_len,
pjmedia_frame *output);
static pj_status_t ffmpeg_codec_decode( pjmedia_vid_codec *codec,
const pjmedia_frame *input,
unsigned output_buf_len,
pjmedia_frame *output);
static pj_status_t ffmpeg_codec_recover( pjmedia_vid_codec *codec,
unsigned output_buf_len,
pjmedia_frame *output);
/* Definition for FFMPEG codecs operations. */
static pjmedia_vid_codec_op ffmpeg_op =
{
&ffmpeg_codec_init,
&ffmpeg_codec_open,
&ffmpeg_codec_close,
&ffmpeg_codec_modify,
&ffmpeg_codec_get_param,
&ffmpeg_packetize,
&ffmpeg_unpacketize,
&ffmpeg_codec_encode,
&ffmpeg_codec_decode,
NULL //&ffmpeg_codec_recover
};
/* Definition for FFMPEG codecs factory operations. */
static pjmedia_vid_codec_factory_op ffmpeg_factory_op =
{
&ffmpeg_test_alloc,
&ffmpeg_default_attr,
&ffmpeg_enum_codecs,
&ffmpeg_alloc_codec,
&ffmpeg_dealloc_codec
};
/* FFMPEG codecs factory */
static struct ffmpeg_factory {
pjmedia_vid_codec_factory base;
pjmedia_vid_codec_mgr *mgr;
pj_pool_factory *pf;
pj_pool_t *pool;
pj_mutex_t *mutex;
} ffmpeg_factory;
typedef struct ffmpeg_codec_desc ffmpeg_codec_desc;
/* ITU resolution ID */
typedef enum itu_res_id {
ITU_RES_SQCIF,
ITU_RES_QCIF,
ITU_RES_CIF,
ITU_RES_4CIF,
ITU_RES_16CIF,
ITU_RES_CUSTOM,
} itu_res_id;
/* ITU resolution definition */
struct itu_res {
itu_res_id id;
pj_str_t name;
pjmedia_rect_size size;
} itu_res_def [] =
{
{ITU_RES_16CIF, {"16CIF",5}, {1408,1142}},
{ITU_RES_4CIF, {"4CIF",4}, {704,576}},
{ITU_RES_CIF, {"CIF",3}, {352,288}},
{ITU_RES_QCIF, {"QCIF",4}, {176,144}},
{ITU_RES_SQCIF, {"SQCIF",5}, {88,72}},
{ITU_RES_CUSTOM, {"CUSTOM",6}, {0,0}},
};
/* FFMPEG codecs private data. */
typedef struct ffmpeg_private {
const ffmpeg_codec_desc *desc;
pjmedia_vid_codec_param param; /**< Codec param */
pj_pool_t *pool; /**< Pool for each instance */
pj_timestamp last_tx; /**< Timestamp of last
transmit */
/* Format info and apply format param */
const pjmedia_video_format_info *enc_vfi;
pjmedia_video_apply_fmt_param enc_vafp;
const pjmedia_video_format_info *dec_vfi;
pjmedia_video_apply_fmt_param dec_vafp;
/* The ffmpeg codec states. */
AVCodec *enc;
AVCodec *dec;
AVCodecContext *enc_ctx;
AVCodecContext *dec_ctx;
/* The ffmpeg decoder cannot set the output format, so format conversion
* may be needed for post-decoding.
*/
enum PixelFormat expected_dec_fmt;
/**< expected output format of
ffmpeg decoder */
} ffmpeg_private;
typedef pj_status_t (*func_packetize) (pj_uint8_t *buf,
pj_size_t buf_len,
unsigned *pos,
int max_payload_len,
const pj_uint8_t **payload,
pj_size_t *payload_len);
typedef pj_status_t (*func_unpacketize) (const pj_uint8_t *payload,
pj_size_t payload_len,
pj_uint8_t *bits,
pj_size_t *bits_len);
typedef pj_status_t (*func_parse_fmtp) (ffmpeg_private *ff);
/* FFMPEG codec info */
struct ffmpeg_codec_desc {
/* Predefined info */
pjmedia_vid_codec_info info;
pjmedia_format_id base_fmt_id;
pj_uint32_t avg_bps;
pj_uint32_t max_bps;
func_packetize packetize;
func_unpacketize unpacketize;
func_parse_fmtp parse_fmtp;
pjmedia_codec_fmtp dec_fmtp;
/* Init time defined info */
pj_bool_t enabled;
AVCodec *enc;
AVCodec *dec;
};
/* H263 packetizer */
static pj_status_t h263_packetize(pj_uint8_t *buf,
pj_size_t buf_len,
unsigned *pos,
int max_payload_len,
const pj_uint8_t **payload,
pj_size_t *payload_len)
{
return pjmedia_h263_packetize(buf, buf_len, pos, max_payload_len,
payload, payload_len);
}
/* H263 unpacketizer */
static pj_status_t h263_unpacketize(const pj_uint8_t *payload,
pj_size_t payload_len,
pj_uint8_t *bits,
pj_size_t *bits_len)
{
return pjmedia_h263_unpacketize(payload, payload_len, bits, bits_len);
}
/* H263 fmtp parser */
static pj_status_t h263_parse_fmtp(ffmpeg_private *ff);
/* Internal codec info */
ffmpeg_codec_desc codec_desc[] =
{
{
{PJMEDIA_FORMAT_H263P, {"H263-1998",9}, PJMEDIA_RTP_PT_H263P},
PJMEDIA_FORMAT_H263, 1000000, 2000000,
&h263_packetize, &h263_unpacketize, &h263_parse_fmtp,
{2, { {{"CIF",3}, {"2",1}}, {{"QCIF",4}, {"1",1}}, } },
},
{
{PJMEDIA_FORMAT_H263, {"H263",4}, PJMEDIA_RTP_PT_H263},
},
{
{PJMEDIA_FORMAT_H264, {"H264",4}, PJMEDIA_RTP_PT_H264},
},
{
{PJMEDIA_FORMAT_H261, {"H261",4}, PJMEDIA_RTP_PT_H261},
},
{
{PJMEDIA_FORMAT_MJPEG, {"JPEG",4}, PJMEDIA_RTP_PT_JPEG},
},
{
{PJMEDIA_FORMAT_MPEG4, {"MP4V",4}},
},
{
{PJMEDIA_FORMAT_XVID, {"XVID",4}},
PJMEDIA_FORMAT_MPEG4,
},
};
/* Parse fmtp value for custom resolution, e.g: "CUSTOM=800,600,2" */
static pj_status_t parse_fmtp_itu_custom_res(const pj_str_t *fmtp_val,
pjmedia_rect_size *size,
unsigned *mpi)
{
const char *p, *p_end;
pj_str_t token;
unsigned long val[3] = {0};
unsigned i = 0;
p = token.ptr = fmtp_val->ptr;
p_end = p + fmtp_val->slen;
while (p<=p_end && i<PJ_ARRAY_SIZE(val)) {
if (*p==',' || p==p_end) {
token.slen = (char*)p - token.ptr;
val[i++] = pj_strtoul(&token);
token.ptr = (char*)p+1;
}
++p;
}
if (!val[0] || !val[1])
return PJ_ETOOSMALL;
if (val[2]<1 || val[2]>32)
return PJ_EINVAL;
size->w = val[0];
size->h = val[1];
*mpi = val[2];
return PJ_SUCCESS;
}
#define CALC_ITU_CUSTOM_RES_SCORE(size, mpi) ((size)->w * (size)->h / mpi)
/* ITU codec capabilities */
typedef struct itu_cap
{
/* Lowest MPI for each non-custom resolution */
unsigned lowest_mpi[PJ_ARRAY_SIZE(itu_res_def)];
/* For custom resolution, we use maximum processing score */
unsigned custom_res_max_score;
} itu_cap;
static pj_status_t load_itu_cap(const pjmedia_codec_fmtp *fmtp,
itu_cap *cap)
{
unsigned i, j;
unsigned min_mpi = 0;
/* Get Minimum Picture Interval (MPI) for each resolution. If a resolution
* has no MPI setting in fmtp, the MPI setting is derived from the higher
* resolution.
*/
for (i=0; i<PJ_ARRAY_SIZE(itu_res_def); ++i) {
/* Init lowest MPI */
cap->lowest_mpi[i] = min_mpi? min_mpi:1;
for (j=0; j<fmtp->cnt; ++j) {
if (pj_stricmp(&fmtp->param[j].name, &itu_res_def[i].name)==0) {
pjmedia_rect_size size;
unsigned mpi;
unsigned score;
if (i != ITU_RES_CUSTOM) {
size = itu_res_def[i].size;
mpi = pj_strtoul(&fmtp->param[j].val);
if (min_mpi)
min_mpi = PJ_MIN(mpi, min_mpi);
else
min_mpi = mpi;
/* Update the lowest MPI for this resolution */
cap->lowest_mpi[i] = min_mpi;
/* Also update the processing score for the custom
* resolution.
*/
score = CALC_ITU_CUSTOM_RES_SCORE(&size, mpi);
cap->custom_res_max_score =
PJ_MAX(score, cap->custom_res_max_score);
} else {
if (parse_fmtp_itu_custom_res(&fmtp->param[j].val,
&size, &mpi) == PJ_SUCCESS)
{
score = CALC_ITU_CUSTOM_RES_SCORE(&size, mpi);
cap->custom_res_max_score =
PJ_MAX(score, cap->custom_res_max_score);
}
}
}
}
}
return PJ_SUCCESS;
}
/* H263 fmtp parser */
static pj_status_t h263_parse_fmtp(ffmpeg_private *ff)
{
pjmedia_dir dir;
pj_status_t status;
dir = ff->param.dir;
if (ff->param.dir & PJMEDIA_DIR_ENCODING) {
pjmedia_vid_codec_param param_ref;
pjmedia_codec_fmtp *fmtp_rem, *fmtp_ref;
itu_cap local_cap;
pjmedia_rect_size size = {0};
unsigned mpi = 0;
pj_bool_t got_good_res = PJ_FALSE;
pj_bool_t has_prefered_res = PJ_FALSE;
unsigned i, j;
fmtp_rem = &ff->param.enc_fmtp;
dir &= ~PJMEDIA_DIR_ENCODING;
/* Get default fmtp setting as the reference for local capabilities */
status = pjmedia_vid_codec_mgr_get_default_param(
ffmpeg_factory.mgr, &ff->desc->info, &param_ref);
fmtp_ref = (status==PJ_SUCCESS)? &param_ref.enc_fmtp : fmtp_rem;
/* Load default local capabilities */
status = load_itu_cap(fmtp_ref, &local_cap);
pj_assert(status == PJ_SUCCESS);
/* Negotiate resolution and MPI */
for (i=0; i<fmtp_rem->cnt && !got_good_res; ++i)
{
for (j=0; j<PJ_ARRAY_SIZE(itu_res_def) && !got_good_res; ++j)
{
if (pj_stricmp(&fmtp_rem->param[i].name, &itu_res_def[j].name))
continue;
has_prefered_res = PJ_TRUE;
if (j == ITU_RES_CUSTOM) {
unsigned score;
if (parse_fmtp_itu_custom_res(&fmtp_rem->param[i].val,
&size, &mpi) != PJ_SUCCESS)
{
/* Invalid custom resolution format, skip this
* custom resolution
*/
break;
}
score = CALC_ITU_CUSTOM_RES_SCORE(&size, mpi);
if (score <= local_cap.custom_res_max_score)
got_good_res = PJ_TRUE;
} else {
mpi = pj_strtoul(&fmtp_rem->param[i].val);
if (mpi>=1 && mpi<=32 && mpi>=local_cap.lowest_mpi[j]) {
got_good_res = PJ_TRUE;
size = itu_res_def[j].size;
}
}
}
}
if (has_prefered_res) {
if (got_good_res) {
pjmedia_video_format_detail *vfd;
/* Apply this size & MPI */
vfd = pjmedia_format_get_video_format_detail(&ff->param.enc_fmt,
PJ_TRUE);
vfd->size = size;
vfd->fps.num = 30000;
vfd->fps.denum = 1001 * mpi;
got_good_res = PJ_TRUE;
PJ_TODO(NOTIFY_APP_ABOUT_THIS_NEW_ENCODING_FORMAT);
} else {
return PJMEDIA_EBADFMT;
}
}
}
return PJ_SUCCESS;
}
static const ffmpeg_codec_desc* find_codec_desc_by_info(
const pjmedia_vid_codec_info *info)
{
int i;
for (i=0; i<PJ_ARRAY_SIZE(codec_desc); ++i) {
ffmpeg_codec_desc *desc = &codec_desc[i];
if (desc->enabled &&
(desc->info.fmt_id == info->fmt_id) &&
((desc->info.dir & info->dir) == info->dir) &&
pj_stricmp(&desc->info.encoding_name, &info->encoding_name)==0)
{
return desc;
}
}
return NULL;
}
static int find_codec_idx_by_fmt_id(pjmedia_format_id fmt_id)
{
int i;
for (i=0; i<PJ_ARRAY_SIZE(codec_desc); ++i) {
if (codec_desc[i].info.fmt_id == fmt_id)
return i;
}
return -1;
}
/*
* Initialize and register FFMPEG codec factory to pjmedia endpoint.
*/
PJ_DEF(pj_status_t) pjmedia_codec_ffmpeg_init(pjmedia_vid_codec_mgr *mgr,
pj_pool_factory *pf)
{
pj_pool_t *pool;
AVCodec *c;
pj_status_t status;
unsigned i;
if (ffmpeg_factory.pool != NULL) {
/* Already initialized. */
return PJ_SUCCESS;
}
if (!mgr) mgr = pjmedia_vid_codec_mgr_instance();
PJ_ASSERT_RETURN(mgr, PJ_EINVAL);
/* Create FFMPEG codec factory. */
ffmpeg_factory.base.op = &ffmpeg_factory_op;
ffmpeg_factory.base.factory_data = NULL;
ffmpeg_factory.mgr = mgr;
ffmpeg_factory.pf = pf;
pool = pj_pool_create(pf, "ffmpeg codec factory", 256, 256, NULL);
if (!pool)
return PJ_ENOMEM;
/* Create mutex. */
status = pj_mutex_create_simple(pool, "ffmpeg codec factory",
&ffmpeg_factory.mutex);
if (status != PJ_SUCCESS)
goto on_error;
avcodec_init();
avcodec_register_all();
av_log_set_level(AV_LOG_ERROR);
/* Enum FFMPEG codecs */
for (c=av_codec_next(NULL); c; c=av_codec_next(c))
{
ffmpeg_codec_desc *desc;
pjmedia_format_id fmt_id;
int codec_info_idx;
if (c->type != CODEC_TYPE_VIDEO)
continue;
/* Video encoder and decoder are usually implemented in separate
* AVCodec instances. While the codec attributes (e.g: raw formats,
* supported fps) are in the encoder.
*/
//PJ_LOG(3, (THIS_FILE, "%s", c->name));
status = CodecID_to_pjmedia_format_id(c->id, &fmt_id);
/* Skip if format ID is unknown */
if (status != PJ_SUCCESS)
continue;
codec_info_idx = find_codec_idx_by_fmt_id(fmt_id);
/* Skip if codec is unwanted by this wrapper (not listed in
* the codec info array)
*/
if (codec_info_idx < 0)
continue;
desc = &codec_desc[codec_info_idx];
/* Skip duplicated codec implementation */
if ((c->encode && (desc->info.dir & PJMEDIA_DIR_ENCODING)) ||
(c->decode && (desc->info.dir & PJMEDIA_DIR_DECODING)))
{
continue;
}
/* Get raw/decoded format ids in the encoder */
if (c->pix_fmts && c->encode) {
pjmedia_format_id raw_fmt[PJMEDIA_VID_CODEC_MAX_DEC_FMT_CNT];
unsigned raw_fmt_cnt = 0;
unsigned raw_fmt_cnt_should_be = 0;
const enum PixelFormat *p = c->pix_fmts;
for(;(p && *p != -1) &&
(raw_fmt_cnt < PJMEDIA_VID_CODEC_MAX_DEC_FMT_CNT);
++p)
{
pjmedia_format_id fmt_id;
raw_fmt_cnt_should_be++;
status = PixelFormat_to_pjmedia_format_id(*p, &fmt_id);
if (status != PJ_SUCCESS) {
PJ_LOG(6, (THIS_FILE, "Unrecognized ffmpeg pixel "
"format %d", *p));
continue;
}
raw_fmt[raw_fmt_cnt++] = fmt_id;
}
if (raw_fmt_cnt == 0) {
PJ_LOG(5, (THIS_FILE, "No recognized raw format "
"for codec [%s/%s], codec ignored",
c->name, c->long_name));
/* Skip this encoder */
continue;
}
if (raw_fmt_cnt < raw_fmt_cnt_should_be) {
PJ_LOG(6, (THIS_FILE, "Codec [%s/%s] have %d raw formats, "
"recognized only %d raw formats",
c->name, c->long_name,
raw_fmt_cnt_should_be, raw_fmt_cnt));
}
desc->info.dec_fmt_id_cnt = raw_fmt_cnt;
pj_memcpy(desc->info.dec_fmt_id, raw_fmt,
sizeof(raw_fmt[0])*raw_fmt_cnt);
}
/* Get supported framerates */
if (c->supported_framerates) {
const AVRational *fr = c->supported_framerates;
while ((fr->num != 0 || fr->den != 0) &&
desc->info.fps_cnt < PJMEDIA_VID_CODEC_MAX_FPS_CNT)
{
desc->info.fps[desc->info.fps_cnt].num = fr->num;
desc->info.fps[desc->info.fps_cnt].denum = fr->den;
++desc->info.fps_cnt;
++fr;
}
}
/* Get ffmpeg encoder instance */
if (c->encode && !desc->enc) {
desc->info.dir |= PJMEDIA_DIR_ENCODING;
desc->enc = c;
}
/* Get ffmpeg decoder instance */
if (c->decode && !desc->dec) {
desc->info.dir |= PJMEDIA_DIR_DECODING;
desc->dec = c;
}
/* Enable this codec when any ffmpeg codec instance are recognized
* and the supported raw formats info has been collected.
*/
if ((desc->dec || desc->enc) && desc->info.dec_fmt_id_cnt)
{
desc->enabled = PJ_TRUE;
}
/* Normalize default value of clock rate */
if (desc->info.clock_rate == 0)
desc->info.clock_rate = 90000;
/* Set RTP packetization support flag in the codec info */
desc->info.has_rtp_pack = (desc->packetize != NULL) &&
(desc->unpacketize != NULL);
}
/* Init unassigned encoder/decoder description from base codec */
for (i = 0; i < PJ_ARRAY_SIZE(codec_desc); ++i) {
ffmpeg_codec_desc *desc = &codec_desc[i];
if (desc->base_fmt_id && (!desc->dec || !desc->enc)) {
ffmpeg_codec_desc *base_desc = NULL;
int base_desc_idx;
pjmedia_dir copied_dir = PJMEDIA_DIR_NONE;
base_desc_idx = find_codec_idx_by_fmt_id(desc->base_fmt_id);
if (base_desc_idx != -1)
base_desc = &codec_desc[base_desc_idx];
if (!base_desc || !base_desc->enabled)
continue;
/* Copy description from base codec */
if (!desc->info.dec_fmt_id_cnt) {
desc->info.dec_fmt_id_cnt = base_desc->info.dec_fmt_id_cnt;
pj_memcpy(desc->info.dec_fmt_id, base_desc->info.dec_fmt_id,
sizeof(pjmedia_format_id)*desc->info.dec_fmt_id_cnt);
}
if (!desc->info.fps_cnt) {
desc->info.fps_cnt = base_desc->info.fps_cnt;
pj_memcpy(desc->info.fps, base_desc->info.fps,
sizeof(desc->info.fps[0])*desc->info.fps_cnt);
}
if (!desc->info.clock_rate) {
desc->info.clock_rate = base_desc->info.clock_rate;
}
if (!desc->dec && base_desc->dec) {
copied_dir |= PJMEDIA_DIR_DECODING;
desc->dec = base_desc->dec;
}
if (!desc->enc && base_desc->enc) {
copied_dir |= PJMEDIA_DIR_ENCODING;
desc->enc = base_desc->enc;
}
desc->info.dir |= copied_dir;
desc->enabled = (desc->info.dir != PJMEDIA_DIR_NONE);
if (copied_dir != PJMEDIA_DIR_NONE) {
const char *dir_name[] = {NULL, "encoder", "decoder", "codec"};
PJ_LOG(5, (THIS_FILE, "The %.*s %s is using base codec (%.*s)",
desc->info.encoding_name.slen,
desc->info.encoding_name.ptr,
dir_name[copied_dir],
base_desc->info.encoding_name.slen,
base_desc->info.encoding_name.ptr));
}
}
}
/* Register codec factory to codec manager. */
status = pjmedia_vid_codec_mgr_register_factory(mgr,
&ffmpeg_factory.base);
if (status != PJ_SUCCESS)
goto on_error;
ffmpeg_factory.pool = pool;
/* Done. */
return PJ_SUCCESS;
on_error:
pj_pool_release(pool);
return status;
}
/*
* Unregister FFMPEG codecs factory from pjmedia endpoint.
*/
PJ_DEF(pj_status_t) pjmedia_codec_ffmpeg_deinit(void)
{
pj_status_t status = PJ_SUCCESS;
if (ffmpeg_factory.pool == NULL) {
/* Already deinitialized */
return PJ_SUCCESS;
}
pj_mutex_lock(ffmpeg_factory.mutex);
/* Unregister FFMPEG codecs factory. */
status = pjmedia_vid_codec_mgr_unregister_factory(ffmpeg_factory.mgr,
&ffmpeg_factory.base);
/* Destroy mutex. */
pj_mutex_destroy(ffmpeg_factory.mutex);
/* Destroy pool. */
pj_pool_release(ffmpeg_factory.pool);
ffmpeg_factory.pool = NULL;
return status;
}
/*
* Check if factory can allocate the specified codec.
*/
static pj_status_t ffmpeg_test_alloc( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *info )
{
const ffmpeg_codec_desc *desc;
PJ_ASSERT_RETURN(factory==&ffmpeg_factory.base, PJ_EINVAL);
PJ_ASSERT_RETURN(info, PJ_EINVAL);
desc = find_codec_desc_by_info(info);
if (!desc) {
return PJMEDIA_CODEC_EUNSUP;
}
return PJ_SUCCESS;
}
/*
* Generate default attribute.
*/
static pj_status_t ffmpeg_default_attr( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *info,
pjmedia_vid_codec_param *attr )
{
const ffmpeg_codec_desc *desc;
PJ_ASSERT_RETURN(factory==&ffmpeg_factory.base, PJ_EINVAL);
PJ_ASSERT_RETURN(info && attr, PJ_EINVAL);
desc = find_codec_desc_by_info(info);
if (!desc) {
return PJMEDIA_CODEC_EUNSUP;
}
pj_bzero(attr, sizeof(pjmedia_vid_codec_param));
/* Direction */
attr->dir = desc->info.dir;
/* Encoded format */
pjmedia_format_init_video(&attr->enc_fmt, desc->info.fmt_id,
352, 288, 30000, 1001);
/* Decoded format */
pjmedia_format_init_video(&attr->dec_fmt, desc->info.dec_fmt_id[0],
352, 288, 30000, 1001);
/* Decoding fmtp */
attr->dec_fmtp = desc->dec_fmtp;
/* Bitrate */
attr->enc_fmt.det.vid.avg_bps = desc->avg_bps;
attr->enc_fmt.det.vid.max_bps = desc->max_bps;
return PJ_SUCCESS;
}
/*
* Enum codecs supported by this factory.
*/
static pj_status_t ffmpeg_enum_codecs( pjmedia_vid_codec_factory *factory,
unsigned *count,
pjmedia_vid_codec_info codecs[])
{
unsigned i, max_cnt;
PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL);
PJ_ASSERT_RETURN(factory == &ffmpeg_factory.base, PJ_EINVAL);
max_cnt = PJ_MIN(*count, PJ_ARRAY_SIZE(codec_desc));
*count = 0;
for (i=0; i<max_cnt; ++i) {
if (codec_desc[i].enabled) {
pj_memcpy(&codecs[*count], &codec_desc[i].info,
sizeof(pjmedia_vid_codec_info));
(*count)++;
}
}
return PJ_SUCCESS;
}
/*
* Allocate a new codec instance.
*/
static pj_status_t ffmpeg_alloc_codec( pjmedia_vid_codec_factory *factory,
const pjmedia_vid_codec_info *info,
pjmedia_vid_codec **p_codec)
{
ffmpeg_private *ff;
const ffmpeg_codec_desc *desc;
pjmedia_vid_codec *codec;
pj_pool_t *pool = NULL;
pj_status_t status = PJ_SUCCESS;
PJ_ASSERT_RETURN(factory && info && p_codec, PJ_EINVAL);
PJ_ASSERT_RETURN(factory == &ffmpeg_factory.base, PJ_EINVAL);
desc = find_codec_desc_by_info(info);
if (!desc) {
return PJMEDIA_CODEC_EUNSUP;
}
/* Create pool for codec instance */
pool = pj_pool_create(ffmpeg_factory.pf, "ffmpeg codec", 512, 512, NULL);
codec = PJ_POOL_ZALLOC_T(pool, pjmedia_vid_codec);
if (!codec) {
status = PJ_ENOMEM;
goto on_error;
}
codec->op = &ffmpeg_op;
codec->factory = factory;
ff = PJ_POOL_ZALLOC_T(pool, ffmpeg_private);
if (!ff) {
status = PJ_ENOMEM;
goto on_error;
}
codec->codec_data = ff;
ff->pool = pool;
ff->enc = desc->enc;
ff->dec = desc->dec;
ff->desc = desc;
*p_codec = codec;
return PJ_SUCCESS;
on_error:
if (pool)
pj_pool_release(pool);
return status;
}
/*
* Free codec.
*/
static pj_status_t ffmpeg_dealloc_codec( pjmedia_vid_codec_factory *factory,
pjmedia_vid_codec *codec )
{
ffmpeg_private *ff;
pj_pool_t *pool;
PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL);
PJ_ASSERT_RETURN(factory == &ffmpeg_factory.base, PJ_EINVAL);
/* Close codec, if it's not closed. */
ff = (ffmpeg_private*) codec->codec_data;
pool = ff->pool;
codec->codec_data = NULL;
pj_pool_release(pool);
return PJ_SUCCESS;
}
/*
* Init codec.
*/
static pj_status_t ffmpeg_codec_init( pjmedia_vid_codec *codec,
pj_pool_t *pool )
{
PJ_UNUSED_ARG(codec);
PJ_UNUSED_ARG(pool);
return PJ_SUCCESS;
}
static void print_ffmpeg_err(int err)
{
#if LIBAVCODEC_VERSION_MAJOR >= 52 && LIBAVCODEC_VERSION_MINOR >= 72
char errbuf[512];
if (av_strerror(err, errbuf, sizeof(errbuf)) >= 0)
PJ_LOG(1, (THIS_FILE, "ffmpeg err %d: %s", err, errbuf));
#else
PJ_LOG(1, (THIS_FILE, "ffmpeg err %d", err));
#endif
}
static enum PixelFormat dec_get_format(struct AVCodecContext *s,
const enum PixelFormat * fmt)
{
ffmpeg_private *ff = (ffmpeg_private*)s->opaque;
enum PixelFormat def_fmt = *fmt;
while (*fmt != -1) {
if (*fmt == ff->expected_dec_fmt)
return *fmt;
++fmt;
}
pj_assert(!"Inconsistency in supported formats");
return def_fmt;
}
static pj_status_t open_ffmpeg_codec(ffmpeg_private *ff,
pj_mutex_t *ff_mutex)
{
enum PixelFormat pix_fmt;
pj_status_t status;
pjmedia_video_format_detail *vfd;
status = pjmedia_format_id_to_PixelFormat(ff->param.dec_fmt.id,
&pix_fmt);
if (status != PJ_SUCCESS)
return status;
vfd = pjmedia_format_get_video_format_detail(&ff->param.enc_fmt,
PJ_TRUE);
ff->expected_dec_fmt = pix_fmt;
while (((ff->param.dir & PJMEDIA_DIR_ENCODING) && ff->enc_ctx == NULL) ||
((ff->param.dir & PJMEDIA_DIR_DECODING) && ff->dec_ctx == NULL))
{
pjmedia_dir dir;
AVCodecContext *ctx = NULL;
AVCodec *codec = NULL;
int err;
/* Set which direction to open */
if (ff->param.dir==PJMEDIA_DIR_ENCODING_DECODING && ff->enc!=ff->dec) {
dir = ff->enc_ctx? PJMEDIA_DIR_DECODING : PJMEDIA_DIR_ENCODING;
} else {
dir = ff->param.dir;
}
/* Init ffmpeg codec context */
ctx = avcodec_alloc_context();
/* Common attributes */
ctx->pix_fmt = pix_fmt;
ctx->workaround_bugs = FF_BUG_AUTODETECT;
ctx->opaque = ff;
if (dir & PJMEDIA_DIR_ENCODING) {
codec = ff->enc;
/* Encoding only attributes */
ctx->width = vfd->size.w;
ctx->height = vfd->size.h;
ctx->time_base.num = vfd->fps.denum;
ctx->time_base.den = vfd->fps.num;
if (vfd->avg_bps) {
ctx->bit_rate = vfd->avg_bps;
if (vfd->max_bps > vfd->avg_bps)
ctx->bit_rate_tolerance = vfd->max_bps - vfd->avg_bps;
}
/* Libx264 experimental setting (it rejects ffmpeg defaults) */
if (ff->param.enc_fmt.id == PJMEDIA_FORMAT_H264) {
ctx->me_range = 16;
ctx->max_qdiff = 4;
ctx->qmin = 10;
ctx->qmax = 51;
ctx->qcompress = 0.6f;
}
/* For encoder, should be better to be strict to the standards */
ctx->strict_std_compliance = FF_COMPLIANCE_STRICT;
}
if (dir & PJMEDIA_DIR_DECODING) {
codec = ff->dec;
/* Decoding only attributes */
/* Width/height may be overriden by ffmpeg after first decoding. */
ctx->width = ctx->coded_width = ff->param.dec_fmt.det.vid.size.w;
ctx->height = ctx->coded_height = ff->param.dec_fmt.det.vid.size.h;
/* For decoder, be more flexible */
if (ff->param.dir!=PJMEDIA_DIR_ENCODING_DECODING ||
ff->enc!=ff->dec)
{
ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
}
ctx->get_format = &dec_get_format;
}
/* avcodec_open() should be protected */
pj_mutex_lock(ff_mutex);
err = avcodec_open(ctx, codec);
pj_mutex_unlock(ff_mutex);
if (err < 0) {
print_ffmpeg_err(err);
return PJMEDIA_CODEC_EFAILED;
}
if (dir & PJMEDIA_DIR_ENCODING)
ff->enc_ctx = ctx;
if (dir & PJMEDIA_DIR_DECODING)
ff->dec_ctx = ctx;
}
return PJ_SUCCESS;
}
/*
* Open codec.
*/
static pj_status_t ffmpeg_codec_open( pjmedia_vid_codec *codec,
pjmedia_vid_codec_param *attr )
{
ffmpeg_private *ff;
pj_status_t status;
pj_mutex_t *ff_mutex;
PJ_ASSERT_RETURN(codec && attr, PJ_EINVAL);
ff = (ffmpeg_private*)codec->codec_data;
pj_memcpy(&ff->param, attr, sizeof(*attr));
/* Apply SDP fmtp attribute */
if (ff->desc->parse_fmtp) {
status = (*ff->desc->parse_fmtp)(ff);
if (status != PJ_SUCCESS)
goto on_error;
}
/* Open the codec */
ff_mutex = ((struct ffmpeg_factory*)codec->factory)->mutex;
status = open_ffmpeg_codec(ff, ff_mutex);
if (status != PJ_SUCCESS)
goto on_error;
/* Init format info and apply-param of decoder */
ff->dec_vfi = pjmedia_get_video_format_info(NULL, ff->param.dec_fmt.id);
if (!ff->dec_vfi) {
status = PJ_EINVAL;
goto on_error;
}
pj_bzero(&ff->dec_vafp, sizeof(ff->dec_vafp));
ff->dec_vafp.size = ff->param.dec_fmt.det.vid.size;
ff->dec_vafp.buffer = NULL;
status = (*ff->dec_vfi->apply_fmt)(ff->dec_vfi, &ff->dec_vafp);
if (status != PJ_SUCCESS) {
goto on_error;
}
/* Init format info and apply-param of encoder */
ff->enc_vfi = pjmedia_get_video_format_info(NULL, ff->param.dec_fmt.id);
if (!ff->enc_vfi) {
status = PJ_EINVAL;
goto on_error;
}
pj_bzero(&ff->enc_vafp, sizeof(ff->enc_vafp));
ff->enc_vafp.size = ff->param.enc_fmt.det.vid.size;
ff->enc_vafp.buffer = NULL;
status = (*ff->enc_vfi->apply_fmt)(ff->enc_vfi, &ff->enc_vafp);
if (status != PJ_SUCCESS) {
goto on_error;
}
/* Update codec attributes, e.g: encoding format may be changed by
* SDP fmtp negotiation.
*/
pj_memcpy(attr, &ff->param, sizeof(*attr));
return PJ_SUCCESS;
on_error:
ffmpeg_codec_close(codec);
return status;
}
/*
* Close codec.
*/
static pj_status_t ffmpeg_codec_close( pjmedia_vid_codec *codec )
{
ffmpeg_private *ff;
pj_mutex_t *ff_mutex;
PJ_ASSERT_RETURN(codec, PJ_EINVAL);
ff = (ffmpeg_private*)codec->codec_data;
ff_mutex = ((struct ffmpeg_factory*)codec->factory)->mutex;
pj_mutex_lock(ff_mutex);
if (ff->enc_ctx) {
avcodec_close(ff->enc_ctx);
av_free(ff->enc_ctx);
}
if (ff->dec_ctx && ff->dec_ctx!=ff->enc_ctx) {
avcodec_close(ff->dec_ctx);
av_free(ff->dec_ctx);
}
ff->enc_ctx = NULL;
ff->dec_ctx = NULL;
pj_mutex_unlock(ff_mutex);
return PJ_SUCCESS;
}
/*
* Modify codec settings.
*/
static pj_status_t ffmpeg_codec_modify( pjmedia_vid_codec *codec,
const pjmedia_vid_codec_param *attr)
{
ffmpeg_private *ff = (ffmpeg_private*)codec->codec_data;
PJ_UNUSED_ARG(attr);
PJ_UNUSED_ARG(ff);
return PJ_ENOTSUP;
}
static pj_status_t ffmpeg_codec_get_param(pjmedia_vid_codec *codec,
pjmedia_vid_codec_param *param)
{
ffmpeg_private *ff;
PJ_ASSERT_RETURN(codec && param, PJ_EINVAL);
ff = (ffmpeg_private*)codec->codec_data;
pj_memcpy(param, &ff->param, sizeof(*param));
return PJ_SUCCESS;
}
static pj_status_t ffmpeg_packetize ( pjmedia_vid_codec *codec,
pj_uint8_t *buf,
pj_size_t buf_len,
unsigned *pos,
const pj_uint8_t **payload,
pj_size_t *payload_len)
{
ffmpeg_private *ff = (ffmpeg_private*)codec->codec_data;
if (ff->desc->packetize) {
return (*ff->desc->packetize)(buf, buf_len, pos,
ff->param.enc_mtu, payload,
payload_len);
}
return PJ_ENOTSUP;
}
static pj_status_t ffmpeg_unpacketize(pjmedia_vid_codec *codec,
const pj_uint8_t *payload,
pj_size_t payload_len,
pj_uint8_t *buf,
pj_size_t *buf_len)
{
ffmpeg_private *ff = (ffmpeg_private*)codec->codec_data;
if (ff->desc->unpacketize) {
return (*ff->desc->unpacketize)(payload, payload_len,
buf, buf_len);
}
return PJ_ENOTSUP;
}
/*
* Encode frames.
*/
static pj_status_t ffmpeg_codec_encode( pjmedia_vid_codec *codec,
const pjmedia_frame *input,
unsigned output_buf_len,
pjmedia_frame *output)
{
ffmpeg_private *ff = (ffmpeg_private*)codec->codec_data;
pj_uint8_t *p = (pj_uint8_t*)input->buf;
AVFrame avframe;
pj_uint8_t *out_buf = (pj_uint8_t*)output->buf;
int out_buf_len = output_buf_len;
int err;
/* For some reasons (e.g: SSE/MMX usage), the avcodec_encode_video() must
* have stack aligned to 16 bytes. Let's try to be safe by preparing the
* 16-bytes aligned stack here, in case it's not managed by the ffmpeg.
*/
PJ_ALIGN_DATA(pj_uint32_t i[4], 16);
/* Check if encoder has been opened */
PJ_ASSERT_RETURN(ff->enc_ctx, PJ_EINVALIDOP);
avcodec_get_frame_defaults(&avframe);
avframe.pts = input->timestamp.u64;
for (i[0] = 0; i[0] < ff->enc_vfi->plane_cnt; ++i[0]) {
avframe.data[i[0]] = p;
avframe.linesize[i[0]] = ff->enc_vafp.strides[i[0]];
p += ff->enc_vafp.plane_bytes[i[0]];
}
err = avcodec_encode_video(ff->enc_ctx, out_buf, out_buf_len, &avframe);
if (err < 0) {
print_ffmpeg_err(err);
return PJMEDIA_CODEC_EFAILED;
} else {
output->size = err;
}
return PJ_SUCCESS;
}
/*
* Decode frame.
*/
static pj_status_t ffmpeg_codec_decode( pjmedia_vid_codec *codec,
const pjmedia_frame *input,
unsigned output_buf_len,
pjmedia_frame *output)
{
ffmpeg_private *ff = (ffmpeg_private*)codec->codec_data;
AVFrame avframe;
AVPacket avpacket;
int err, got_picture;
/* Check if decoder has been opened */
PJ_ASSERT_RETURN(ff->dec_ctx, PJ_EINVALIDOP);
/* Reset output frame bit info */
output->bit_info = 0;
/* Validate output buffer size */
if (ff->dec_vafp.framebytes > output_buf_len)
return PJ_ETOOSMALL;
/* Init frame to receive the decoded data, the ffmpeg codec context will
* automatically provide the decoded buffer (single buffer used for the
* whole decoding session, and seems to be freed when the codec context
* closed).
*/
avcodec_get_frame_defaults(&avframe);
/* Init packet, the container of the encoded data */
av_init_packet(&avpacket);
avpacket.data = (pj_uint8_t*)input->buf;
avpacket.size = input->size;
/* ffmpeg warns:
* - input buffer padding, at least FF_INPUT_BUFFER_PADDING_SIZE
* - null terminated
* Normally, encoded buffer is allocated more than needed, so lets just
* bzero the input buffer end/pad, hope it will be just fine.
*/
pj_bzero(avpacket.data+avpacket.size, FF_INPUT_BUFFER_PADDING_SIZE);
output->bit_info = 0;
output->timestamp = input->timestamp;
#if LIBAVCODEC_VERSION_MAJOR >= 52 && LIBAVCODEC_VERSION_MINOR >= 72
avpacket.flags = AV_PKT_FLAG_KEY;
#else
avpacket.flags = 0;
#endif
#if LIBAVCODEC_VERSION_MAJOR >= 52 && LIBAVCODEC_VERSION_MINOR >= 72
err = avcodec_decode_video2(ff->dec_ctx, &avframe,
&got_picture, &avpacket);
#else
err = avcodec_decode_video(ff->dec_ctx, &avframe,
&got_picture, avpacket.data, avpacket.size);
#endif
if (err < 0) {
output->type = PJMEDIA_FRAME_TYPE_NONE;
output->size = 0;
print_ffmpeg_err(err);
return PJMEDIA_CODEC_EFAILED;
} else if (got_picture) {
pjmedia_video_apply_fmt_param *vafp = &ff->dec_vafp;
pj_uint8_t *q = (pj_uint8_t*)output->buf;
unsigned i;
/* Decoder output format is set by libavcodec, in case it is different
* to the configured param.
*/
if (ff->dec_ctx->pix_fmt != ff->expected_dec_fmt ||
ff->dec_ctx->coded_width != (int)vafp->size.w ||
ff->dec_ctx->coded_height != (int)vafp->size.h)
{
pjmedia_format_id new_fmt_id;
pj_status_t status;
/* Get current raw format id from ffmpeg decoder context */
status = PixelFormat_to_pjmedia_format_id(ff->dec_ctx->pix_fmt,
&new_fmt_id);
if (status != PJ_SUCCESS)
return status;
/* Update decoder format in param */
ff->param.dec_fmt.id = new_fmt_id;
ff->param.dec_fmt.det.vid.size.w = ff->dec_ctx->coded_width;
ff->param.dec_fmt.det.vid.size.h = ff->dec_ctx->coded_height;
/* Re-init format info and apply-param of decoder */
ff->dec_vfi = pjmedia_get_video_format_info(NULL, ff->param.dec_fmt.id);
if (!ff->dec_vfi)
return PJ_ENOTSUP;
pj_bzero(&ff->dec_vafp, sizeof(ff->dec_vafp));
ff->dec_vafp.size = ff->param.dec_fmt.det.vid.size;
ff->dec_vafp.buffer = NULL;
status = (*ff->dec_vfi->apply_fmt)(ff->dec_vfi, &ff->dec_vafp);
if (status != PJ_SUCCESS)
return status;
/* Notify application via the bit_info field of pjmedia_frame */
output->bit_info = PJMEDIA_VID_CODEC_EVENT_FMT_CHANGED;
/* Check provided buffer size after format changed */
if (vafp->framebytes > output_buf_len)
return PJ_ETOOSMALL;
}
/* Get the decoded data */
for (i = 0; i < ff->dec_vfi->plane_cnt; ++i) {
pj_uint8_t *p = avframe.data[i];
/* The decoded data may contain padding */
if (avframe.linesize[i]!=vafp->strides[i]) {
/* Padding exists, copy line by line */
pj_uint8_t *q_end;
q_end = q+vafp->plane_bytes[i];
while(q < q_end) {
pj_memcpy(q, p, vafp->strides[i]);
q += vafp->strides[i];
p += avframe.linesize[i];
}
} else {
/* No padding, copy the whole plane */
pj_memcpy(q, p, vafp->plane_bytes[i]);
q += vafp->plane_bytes[i];
}
}
output->type = PJMEDIA_FRAME_TYPE_VIDEO;
output->size = vafp->framebytes;
} else {
output->type = PJMEDIA_FRAME_TYPE_NONE;
output->size = 0;
}
return PJ_SUCCESS;
}
/*
* Recover lost frame.
*/
static pj_status_t ffmpeg_codec_recover( pjmedia_vid_codec *codec,
unsigned output_buf_len,
pjmedia_frame *output)
{
PJ_UNUSED_ARG(codec);
PJ_UNUSED_ARG(output_buf_len);
PJ_UNUSED_ARG(output);
return PJ_ENOTSUP;
}
#ifdef _MSC_VER
# pragma comment( lib, "avcodec.lib")
#endif
#endif /* PJMEDIA_HAS_FFMPEG_CODEC */