| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | /** | ||
| 20 | * @file | ||
| 21 | * Packet sink. Heavily based on libavfilter/buffersink.c | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include "libavutil/avassert.h" | ||
| 25 | #include "libavutil/opt.h" | ||
| 26 | |||
| 27 | #include "libavcodec/bsf.h" | ||
| 28 | #include "libavcodec/bsf_internal.h" | ||
| 29 | #include "libavcodec/packet.h" | ||
| 30 | #include "libavcodec/packet_internal.h" | ||
| 31 | |||
| 32 | typedef struct BufferSinkContext { | ||
| 33 | const AVClass *class; | ||
| 34 | unsigned warning_limit; | ||
| 35 | |||
| 36 | AVPacket *peeked_pkt; | ||
| 37 | } BufferSinkContext; | ||
| 38 | |||
| 39 | ✗ | static int return_or_keep_packet(BufferSinkContext *buf, AVPacket *out, AVPacket *in, int flags) | |
| 40 | { | ||
| 41 | ✗ | if ((flags & AV_BSF_SINK_FLAG_PEEK)) { | |
| 42 | ✗ | buf->peeked_pkt = in; | |
| 43 | ✗ | return av_packet_ref(out, in); | |
| 44 | } else { | ||
| 45 | ✗ | buf->peeked_pkt = NULL; | |
| 46 | ✗ | av_packet_move_ref(out, in); | |
| 47 | ✗ | av_packet_free(&in); | |
| 48 | ✗ | return 0; | |
| 49 | } | ||
| 50 | } | ||
| 51 | |||
| 52 | ✗ | int attribute_align_arg av_bsf_sink_get_packet(AVBitStreamFilterContext *ctx, AVPacket *pkt, int flags) | |
| 53 | { | ||
| 54 | ✗ | BufferSinkContext *buf = ctx->priv_data; | |
| 55 | ✗ | AVBitStreamFilterLink *inlink = ctx->inputs[0]; | |
| 56 | ✗ | BitStreamFilterLinkInternal *li = ff_link_internal(inlink); | |
| 57 | int status, ret; | ||
| 58 | AVPacket *cur_pkt; | ||
| 59 | int64_t pts; | ||
| 60 | ✗ | int buffersrc_empty = 0; | |
| 61 | |||
| 62 | ✗ | if (buf->peeked_pkt) | |
| 63 | ✗ | return return_or_keep_packet(buf, pkt, buf->peeked_pkt, flags); | |
| 64 | |||
| 65 | while (1) { | ||
| 66 | ✗ | ret = ff_bsf_inlink_consume_packet(inlink, &cur_pkt); | |
| 67 | ✗ | if (ret < 0) { | |
| 68 | ✗ | return ret; | |
| 69 | ✗ | } else if (ret) { | |
| 70 | ✗ | return return_or_keep_packet(buf, pkt, cur_pkt, flags); | |
| 71 | ✗ | } else if (ff_bsf_inlink_acknowledge_status(inlink, &status, &pts)) { | |
| 72 | ✗ | return status; | |
| 73 | ✗ | } else if ((flags & AV_BSF_SINK_FLAG_NO_REQUEST)) { | |
| 74 | ✗ | return AVERROR(EAGAIN); | |
| 75 | ✗ | } else if (li->packet_wanted_out) { | |
| 76 | ✗ | ret = ff_bsf_graph_run_once(ctx->graph); | |
| 77 | ✗ | if (ret == FFERROR_SOURCE_EMPTY) { | |
| 78 | ✗ | buffersrc_empty = 1; | |
| 79 | ✗ | } else if (ret == AVERROR(EAGAIN)) { | |
| 80 | ✗ | if (buffersrc_empty) | |
| 81 | ✗ | return ret; | |
| 82 | ✗ | ff_bsf_inlink_request_packet(inlink); | |
| 83 | ✗ | } else if (ret < 0) { | |
| 84 | ✗ | return ret; | |
| 85 | } | ||
| 86 | } else { | ||
| 87 | ✗ | ff_bsf_inlink_request_packet(inlink); | |
| 88 | } | ||
| 89 | } | ||
| 90 | } | ||
| 91 | |||
| 92 | ✗ | static int init(AVBitStreamFilterContext *ctx) | |
| 93 | { | ||
| 94 | ✗ | BufferSinkContext *s = ctx->priv_data; | |
| 95 | |||
| 96 | ✗ | s->warning_limit = 100; | |
| 97 | |||
| 98 | ✗ | return 0; | |
| 99 | } | ||
| 100 | |||
| 101 | 3 | static void uninit(AVBitStreamFilterContext *ctx) | |
| 102 | { | ||
| 103 | 3 | BufferSinkContext *buf = ctx->priv_data; | |
| 104 | |||
| 105 | 3 | av_packet_free(&buf->peeked_pkt); | |
| 106 | 3 | } | |
| 107 | |||
| 108 | ✗ | static int activate(AVBitStreamFilterContext *ctx) | |
| 109 | { | ||
| 110 | ✗ | BufferSinkContext *buf = ctx->priv_data; | |
| 111 | ✗ | BitStreamFilterLinkInternal * const li = ff_link_internal(ctx->inputs[0]); | |
| 112 | |||
| 113 | ✗ | if (buf->warning_limit && | |
| 114 | ✗ | av_container_fifo_can_read(li->fifo) >= buf->warning_limit) { | |
| 115 | ✗ | av_log(ctx, AV_LOG_WARNING, | |
| 116 | "%d buffers queued in %s, something may be wrong.\n", | ||
| 117 | buf->warning_limit, | ||
| 118 | ✗ | (char *)av_x_if_null(ctx->name, ctx->filter->name)); | |
| 119 | ✗ | buf->warning_limit *= 10; | |
| 120 | } | ||
| 121 | |||
| 122 | /* The packet is queued, the rest is up to av_bsf_sink_get_packet */ | ||
| 123 | ✗ | return 0; | |
| 124 | } | ||
| 125 | |||
| 126 | ✗ | AVRational av_bsf_sink_get_time_base(const AVBitStreamFilterContext *ctx) | |
| 127 | { | ||
| 128 | ✗ | av_assert0(ff_bsf(ctx->filter)->activate == activate); | |
| 129 | ✗ | return ctx->inputs[0]->time_base; | |
| 130 | } | ||
| 131 | |||
| 132 | ✗ | const AVCodecParameters *av_bsf_sink_get_parameters(const AVBitStreamFilterContext *ctx) | |
| 133 | { | ||
| 134 | ✗ | av_assert0(ff_bsf(ctx->filter)->activate == activate); | |
| 135 | ✗ | return ctx->inputs[0]->par; | |
| 136 | } | ||
| 137 | |||
| 138 | BSF_DEFINE_CLASS_EXT(sink, "sink", NULL); | ||
| 139 | |||
| 140 | const FFBitStreamFilter ff_sink_bsf = { | ||
| 141 | .p.name = "sink", | ||
| 142 | .p.priv_class = &sink_class, | ||
| 143 | .priv_data_size = sizeof(BufferSinkContext), | ||
| 144 | .init2 = init, | ||
| 145 | .uninit = uninit, | ||
| 146 | .activate = activate, | ||
| 147 | BSFILTER_INPUTS(ff_default_bsf_pad), | ||
| 148 | }; | ||
| 149 |