X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fparser.c;h=fc57246965ccd2f149ea1c05579f58583daaa381;hb=bd96c54fe4819b3ca9a975e2083d67f4443c559b;hp=0c66e80b96ac6bc98edfd429fd1288678d8ab50d;hpb=b656fa710a34ec7c3b192c38344a2c470ff2eaf5;p=ffmpeg diff --git a/libavcodec/parser.c b/libavcodec/parser.c index 0c66e80b96a..fc57246965c 100644 --- a/libavcodec/parser.c +++ b/libavcodec/parser.c @@ -27,94 +27,10 @@ #include "libavutil/avassert.h" #include "libavutil/internal.h" #include "libavutil/mem.h" -#include "libavutil/thread.h" #include "internal.h" #include "parser.h" -/* Parsers */ -extern AVCodecParser ff_aac_parser; -extern AVCodecParser ff_aac_latm_parser; -extern AVCodecParser ff_ac3_parser; -extern AVCodecParser ff_adx_parser; -extern AVCodecParser ff_bmp_parser; -extern AVCodecParser ff_cavsvideo_parser; -extern AVCodecParser ff_cook_parser; -extern AVCodecParser ff_dca_parser; -extern AVCodecParser ff_dirac_parser; -extern AVCodecParser ff_dnxhd_parser; -extern AVCodecParser ff_dpx_parser; -extern AVCodecParser ff_dvaudio_parser; -extern AVCodecParser ff_dvbsub_parser; -extern AVCodecParser ff_dvdsub_parser; -extern AVCodecParser ff_dvd_nav_parser; -extern AVCodecParser ff_flac_parser; -extern AVCodecParser ff_g729_parser; -extern AVCodecParser ff_gsm_parser; -extern AVCodecParser ff_h261_parser; -extern AVCodecParser ff_h263_parser; -extern AVCodecParser ff_h264_parser; -extern AVCodecParser ff_hevc_parser; -extern AVCodecParser ff_mjpeg_parser; -extern AVCodecParser ff_mlp_parser; -extern AVCodecParser ff_mpeg4video_parser; -extern AVCodecParser ff_mpegaudio_parser; -extern AVCodecParser ff_mpegvideo_parser; -extern AVCodecParser ff_opus_parser; -extern AVCodecParser ff_png_parser; -extern AVCodecParser ff_pnm_parser; -extern AVCodecParser ff_rv30_parser; -extern AVCodecParser ff_rv40_parser; -extern AVCodecParser ff_sipr_parser; -extern AVCodecParser ff_tak_parser; -extern AVCodecParser ff_vc1_parser; -extern AVCodecParser ff_vorbis_parser; -extern AVCodecParser ff_vp3_parser; -extern AVCodecParser ff_vp8_parser; -extern AVCodecParser ff_vp9_parser; -extern AVCodecParser ff_xma_parser; - -#include "libavcodec/parser_list.c" - -static AVOnce av_parser_next_init = AV_ONCE_INIT; - -static void av_parser_init_next(void) -{ - AVCodecParser *prev = NULL, *p; - int i = 0; - while ((p = (AVCodecParser*)parser_list[i++])) { - if (prev) - prev->next = p; - prev = p; - } -} - -AVCodecParser *av_parser_next(const AVCodecParser *p) -{ - ff_thread_once(&av_parser_next_init, av_parser_init_next); - - if (p) - return p->next; - else - return (AVCodecParser*)parser_list[0]; -} - -const AVCodecParser *av_parser_iterate(void **opaque) -{ - uintptr_t i = (uintptr_t)*opaque; - const AVCodecParser *p = parser_list[i]; - - if (p) - *opaque = (void*)(i + 1); - - return p; -} - -void av_register_codec_parser(AVCodecParser *parser) -{ - ff_thread_once(&av_parser_next_init, av_parser_init_next); -} - AVCodecParserContext *av_parser_init(int codec_id) { AVCodecParserContext *s = NULL; @@ -139,7 +55,7 @@ found: s = av_mallocz(sizeof(AVCodecParserContext)); if (!s) goto err_out; - s->parser = (AVCodecParser*)parser; + s->parser = parser; s->priv_data = av_mallocz(parser->priv_data_size); if (!s->priv_data) goto err_out; @@ -151,11 +67,6 @@ found: goto err_out; } s->key_frame = -1; -#if FF_API_CONVERGENCE_DURATION -FF_DISABLE_DEPRECATION_WARNINGS - s->convergence_duration = 0; -FF_ENABLE_DEPRECATION_WARNINGS -#endif s->dts_sync_point = INT_MIN; s->dts_ref_dts_delta = INT_MIN; s->pts_dts_delta = INT_MIN; @@ -263,6 +174,9 @@ int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, /* offset of the next frame */ s->next_frame_offset = s->cur_offset + index; s->fetch_timestamp = 1; + } else { + /* Don't return a pointer to dummy_buf. */ + *poutbuf = NULL; } if (index < 0) index = 0; @@ -270,41 +184,6 @@ int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, return index; } -int av_parser_change(AVCodecParserContext *s, AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, int keyframe) -{ - if (s && s->parser->split) { - if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER || - avctx->flags2 & AV_CODEC_FLAG2_LOCAL_HEADER) { - int i = s->parser->split(avctx, buf, buf_size); - buf += i; - buf_size -= i; - } - } - - /* cast to avoid warning about discarding qualifiers */ - *poutbuf = (uint8_t *) buf; - *poutbuf_size = buf_size; - if (avctx->extradata) { - if (keyframe && (avctx->flags2 & AV_CODEC_FLAG2_LOCAL_HEADER)) { - int size = buf_size + avctx->extradata_size; - - *poutbuf_size = size; - *poutbuf = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE); - if (!*poutbuf) - return AVERROR(ENOMEM); - - memcpy(*poutbuf, avctx->extradata, avctx->extradata_size); - memcpy(*poutbuf + avctx->extradata_size, buf, - buf_size + AV_INPUT_BUFFER_PADDING_SIZE); - return 1; - } - } - - return 0; -} - void av_parser_close(AVCodecParserContext *s) { if (s) { @@ -329,6 +208,9 @@ int ff_combine_frame(ParseContext *pc, int next, for (; pc->overread > 0; pc->overread--) pc->buffer[pc->index++] = pc->buffer[pc->overread_index++]; + if (next > *buf_size) + return AVERROR(EINVAL); + /* flush remaining if EOF */ if (!*buf_size && next == END_NOT_FOUND) next = 0; @@ -376,6 +258,10 @@ int ff_combine_frame(ParseContext *pc, int next, *buf = pc->buffer; } + if (next < -8) { + pc->overread += -8 - next; + next = -8; + } /* store overread bytes */ for (; next < 0; next++) { pc->state = pc->state << 8 | pc->buffer[pc->last_index + next]; @@ -399,17 +285,3 @@ void ff_parse_close(AVCodecParserContext *s) av_freep(&pc->buffer); } - -int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size) -{ - uint32_t state = -1; - const uint8_t *ptr = buf, *end = buf + buf_size; - - while (ptr < end) { - ptr = avpriv_find_start_code(ptr, end, &state); - if (state == 0x1B3 || state == 0x1B6) - return ptr - 4 - buf; - } - - return 0; -}