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https://gitee.com/openharmony/third_party_ffmpeg
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avformat/utils: make AVPacketList helper functions shared
Based on a patch by Luca Barbato. Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
parent
51e3010575
commit
3a4d74c1ff
@ -731,5 +731,44 @@ int ff_unlock_avformat(void);
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*/
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void ff_format_set_url(AVFormatContext *s, char *url);
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#define FF_PACKETLIST_FLAG_REF_PACKET (1 << 0) /**< Create a new reference for the packet instead of
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transferring the ownership of the existing one to the
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list. */
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/**
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* Append an AVPacket to the list.
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*
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* @param head List head element
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* @param tail List tail element
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* @param pkt The packet being appended
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* @param flags Any combination of FF_PACKETLIST_FLAG_* flags
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* @return 0 on success, negative AVERROR value on failure. On failure,
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the list is unchanged
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*/
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int ff_packet_list_put(AVPacketList **head, AVPacketList **tail,
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AVPacket *pkt, int flags);
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/**
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* Remove the oldest AVPacket in the list and return it.
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*
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* @note The pkt will be overwritten completely. The caller owns the
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* packet and must unref it by itself.
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*
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* @param head List head element
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* @param tail List tail element
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* @param pkt Pointer to an initialized AVPacket struct
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*/
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int ff_packet_list_get(AVPacketList **head, AVPacketList **tail,
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AVPacket *pkt);
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/**
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* Wipe the list and unref all the packets in it.
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*
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* @param head List head element
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* @param tail List tail element
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*/
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void ff_packet_list_free(AVPacketList **head, AVPacketList **tail);
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void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
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#endif /* AVFORMAT_INTERNAL_H */
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@ -444,8 +444,9 @@ static int init_input(AVFormatContext *s, const char *filename,
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s, 0, s->format_probesize);
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}
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static int add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
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AVPacketList **plast_pktl, int ref)
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int ff_packet_list_put(AVPacketList **packet_buffer,
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AVPacketList **plast_pktl,
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AVPacket *pkt, int flags)
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{
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AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
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int ret;
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@ -453,12 +454,15 @@ static int add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
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if (!pktl)
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return AVERROR(ENOMEM);
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if (ref) {
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if (flags & FF_PACKETLIST_FLAG_REF_PACKET) {
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if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
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av_free(pktl);
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return ret;
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}
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} else {
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// TODO: Adapt callers in this file so the line below can use
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// av_packet_move_ref() to effectively move the reference
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// to the list.
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pktl->pkt = *pkt;
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}
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@ -485,9 +489,10 @@ int avformat_queue_attached_pictures(AVFormatContext *s)
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continue;
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}
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ret = add_to_pktbuf(&s->internal->raw_packet_buffer,
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&s->streams[i]->attached_pic,
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&s->internal->raw_packet_buffer_end, 1);
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ret = ff_packet_list_put(&s->internal->raw_packet_buffer,
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&s->internal->raw_packet_buffer_end,
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&s->streams[i]->attached_pic,
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FF_PACKETLIST_FLAG_REF_PACKET);
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if (ret < 0)
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return ret;
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}
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@ -909,8 +914,9 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
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if (!pktl && st->request_probe <= 0)
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return ret;
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err = add_to_pktbuf(&s->internal->raw_packet_buffer, pkt,
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&s->internal->raw_packet_buffer_end, 0);
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err = ff_packet_list_put(&s->internal->raw_packet_buffer,
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&s->internal->raw_packet_buffer_end,
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pkt, 0);
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if (err)
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return err;
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s->internal->raw_packet_buffer_remaining_size -= pkt->size;
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@ -1408,7 +1414,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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}
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static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
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void ff_packet_list_free(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
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{
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while (*pkt_buf) {
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AVPacketList *pktl = *pkt_buf;
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@ -1500,8 +1506,9 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
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compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
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ret = add_to_pktbuf(&s->internal->parse_queue, &out_pkt,
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&s->internal->parse_queue_end, 1);
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ret = ff_packet_list_put(&s->internal->parse_queue,
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&s->internal->parse_queue_end,
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&out_pkt, FF_PACKETLIST_FLAG_REF_PACKET);
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av_packet_unref(&out_pkt);
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if (ret < 0)
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goto fail;
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@ -1518,9 +1525,9 @@ fail:
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return ret;
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}
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static int read_from_packet_buffer(AVPacketList **pkt_buffer,
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AVPacketList **pkt_buffer_end,
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AVPacket *pkt)
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int ff_packet_list_get(AVPacketList **pkt_buffer,
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AVPacketList **pkt_buffer_end,
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AVPacket *pkt)
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{
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AVPacketList *pktl;
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av_assert0(*pkt_buffer);
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@ -1666,7 +1673,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
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}
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if (!got_packet && s->internal->parse_queue)
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ret = read_from_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
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ret = ff_packet_list_get(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
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if (ret >= 0) {
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AVStream *st = s->streams[pkt->stream_index];
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@ -1745,7 +1752,7 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
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if (!genpts) {
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ret = s->internal->packet_buffer
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? read_from_packet_buffer(&s->internal->packet_buffer,
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? ff_packet_list_get(&s->internal->packet_buffer,
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&s->internal->packet_buffer_end, pkt)
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: read_frame_internal(s, pkt);
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if (ret < 0)
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@ -1794,7 +1801,7 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
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st = s->streams[next_pkt->stream_index];
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if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
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next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
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ret = read_from_packet_buffer(&s->internal->packet_buffer,
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ret = ff_packet_list_get(&s->internal->packet_buffer,
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&s->internal->packet_buffer_end, pkt);
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goto return_packet;
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}
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@ -1809,8 +1816,9 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
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return ret;
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}
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ret = add_to_pktbuf(&s->internal->packet_buffer, pkt,
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&s->internal->packet_buffer_end, 1);
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ret = ff_packet_list_put(&s->internal->packet_buffer,
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&s->internal->packet_buffer_end,
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pkt, FF_PACKETLIST_FLAG_REF_PACKET);
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av_packet_unref(pkt);
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if (ret < 0)
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return ret;
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@ -1837,9 +1845,9 @@ static void flush_packet_queue(AVFormatContext *s)
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{
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if (!s->internal)
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return;
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free_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end);
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free_packet_buffer(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
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free_packet_buffer(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
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ff_packet_list_free(&s->internal->parse_queue, &s->internal->parse_queue_end);
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ff_packet_list_free(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
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ff_packet_list_free(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
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s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
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}
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@ -3739,8 +3747,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
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pkt = &pkt1;
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if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
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ret = add_to_pktbuf(&ic->internal->packet_buffer, pkt,
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&ic->internal->packet_buffer_end, 0);
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ret = ff_packet_list_put(&ic->internal->packet_buffer,
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&ic->internal->packet_buffer_end,
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pkt, 0);
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if (ret < 0)
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goto find_stream_info_err;
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}
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