diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 04046480c872ce8e9a66128f9f60e244814a6051..7b97122043ec8686cb1fbd0e483568d650ea7988 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -847,6 +847,7 @@ OBJS-$(CONFIG_DVD_NAV_PARSER) += dvd_nav_parser.o OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsub_parser.o OBJS-$(CONFIG_FLAC_PARSER) += flac_parser.o flacdata.o flac.o \ vorbis_data.o +OBJS-$(CONFIG_G729_PARSER) += g729_parser.o OBJS-$(CONFIG_GSM_PARSER) += gsm_parser.o OBJS-$(CONFIG_H261_PARSER) += h261_parser.o OBJS-$(CONFIG_H263_PARSER) += h263_parser.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index ed0975ef7cac88fd65b4a5e73d3ed28b7bd5f2b5..04a83d4dc182c4eeb41a5d4e270bc6a8597c438f 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -602,6 +602,7 @@ void avcodec_register_all(void) REGISTER_PARSER(DVDSUB, dvdsub); REGISTER_PARSER(DVD_NAV, dvd_nav); REGISTER_PARSER(FLAC, flac); + REGISTER_PARSER(G729, g729); REGISTER_PARSER(GSM, gsm); REGISTER_PARSER(H261, h261); REGISTER_PARSER(H263, h263); diff --git a/libavcodec/g729.h b/libavcodec/g729.h index 61683130a9f749343f473e583332e27496bcefe0..7c5f693a7a639fc7cee7996afa9ac3399a1680d4 100644 --- a/libavcodec/g729.h +++ b/libavcodec/g729.h @@ -26,4 +26,8 @@ */ #define SUBFRAME_SIZE 40 +/* bytes per block */ +#define G729_8K_BLOCK_SIZE 10 +#define G729D_6K4_BLOCK_SIZE 8 + #endif // AVCODEC_G729_H diff --git a/libavcodec/g729_parser.c b/libavcodec/g729_parser.c new file mode 100644 index 0000000000000000000000000000000000000000..65e97a98b4034b2ee26358c56a6cd0eb53c25a5b --- /dev/null +++ b/libavcodec/g729_parser.c @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2015 Ganesh Ajjanagadde + * + * 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 + * G.729 audio parser + * + * Splits packets into individual blocks. + */ + +#include "parser.h" +#include "g729.h" + +typedef struct G729ParseContext { + ParseContext pc; + int block_size; + int duration; + int remaining; +} G729ParseContext; + +static int g729_parse(AVCodecParserContext *s1, AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + G729ParseContext *s = s1->priv_data; + ParseContext *pc = &s->pc; + int next; + + if (!s->block_size) { + switch (avctx->codec_id) { + case AV_CODEC_ID_G729: + /* FIXME: replace this heuristic block_size with more precise estimate */ + s->block_size = (avctx->bit_rate < 8000) ? G729D_6K4_BLOCK_SIZE : G729_8K_BLOCK_SIZE; + s->duration = avctx->frame_size; + break; + default: + *poutbuf = buf; + *poutbuf_size = buf_size; + av_log(avctx, AV_LOG_ERROR, "Invalid codec_id\n"); + return buf_size; + } + } + + if (!s->remaining) + s->remaining = s->block_size; + if (s->remaining <= buf_size) { + next = s->remaining; + s->remaining = 0; + } else { + next = END_NOT_FOUND; + s->remaining -= buf_size; + } + + if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) { + *poutbuf = NULL; + *poutbuf_size = 0; + return buf_size; + } + + s1->duration = s->duration; + + *poutbuf = buf; + *poutbuf_size = buf_size; + return next; +} + +AVCodecParser ff_g729_parser = { + .codec_ids = { AV_CODEC_ID_G729 }, + .priv_data_size = sizeof(G729ParseContext), + .parser_parse = g729_parse, + .parser_close = ff_parse_close, +};