chasing indexing error

1 files changed, 0 insertions, 474 deletions

diff --git a/ffmpeg/libavformat/movenchint.c b/ffmpeg/libavformat/movenchint.c
deleted file mode 100644
index 9d6a66e..0000000
--- a/ffmpeg/libavformat/movenchint.c
+++ /dev/null
@@ -1,474 +0,0 @@
-/*
- * MOV, 3GP, MP4 muxer RTP hinting
- * Copyright (c) 2010 Martin Storsjo
- *
- * 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
- */
-
-#include "movenc.h"
-#include "libavutil/intreadwrite.h"
-#include "internal.h"
-#include "rtpenc_chain.h"
-#include "avio_internal.h"
-#include "rtp.h"
-
-int ff_mov_init_hinting(AVFormatContext *s, int index, int src_index)
-{
-    MOVMuxContext *mov  = s->priv_data;
-    MOVTrack *track     = &mov->tracks[index];
-    MOVTrack *src_track = &mov->tracks[src_index];
-    AVStream *src_st    = s->streams[src_index];
-    int ret = AVERROR(ENOMEM);
-
-    track->tag = MKTAG('r','t','p',' ');
-    track->src_track = src_index;
-
-    track->enc = avcodec_alloc_context3(NULL);
-    if (!track->enc)
-        goto fail;
-    track->enc->codec_type = AVMEDIA_TYPE_DATA;
-    track->enc->codec_tag  = track->tag;
-
-    ret = ff_rtp_chain_mux_open(&track->rtp_ctx, s, src_st, NULL,
-                                RTP_MAX_PACKET_SIZE, src_index);
-    if (ret < 0)
-        goto fail;
-
-    /* Copy the RTP AVStream timebase back to the hint AVStream */
-    track->timescale = track->rtp_ctx->streams[0]->time_base.den;
-
-    /* Mark the hinted track that packets written to it should be
-     * sent to this track for hinting. */
-    src_track->hint_track = index;
-    return 0;
-fail:
-    av_log(s, AV_LOG_WARNING,
-           "Unable to initialize hinting of stream %d\n", src_index);
-    av_freep(&track->enc);
-    /* Set a default timescale, to avoid crashes in av_dump_format */
-    track->timescale = 90000;
-    return ret;
-}
-
-/**
- * Remove the first sample from the sample queue.
- */
-static void sample_queue_pop(HintSampleQueue *queue)
-{
-    if (queue->len <= 0)
-        return;
-    if (queue->samples[0].own_data)
-        av_free(queue->samples[0].data);
-    queue->len--;
-    memmove(queue->samples, queue->samples + 1, sizeof(HintSample)*queue->len);
-}
-
-/**
- * Empty the sample queue, releasing all memory.
- */
-static void sample_queue_free(HintSampleQueue *queue)
-{
-    int i;
-    for (i = 0; i < queue->len; i++)
-        if (queue->samples[i].own_data)
-            av_free(queue->samples[i].data);
-    av_freep(&queue->samples);
-    queue->len  = 0;
-    queue->size = 0;
-}
-
-/**
- * Add a reference to the sample data to the sample queue. The data is
- * not copied. sample_queue_retain should be called before pkt->data
- * is reused/freed.
- */
-static void sample_queue_push(HintSampleQueue *queue, uint8_t *data, int size,
-                              int sample)
-{
-    /* No need to keep track of smaller samples, since describing them
-     * with immediates is more efficient. */
-    if (size <= 14)
-        return;
-    if (!queue->samples || queue->len >= queue->size) {
-        HintSample *samples;
-        samples = av_realloc_array(queue->samples, queue->size + 10, sizeof(HintSample));
-        if (!samples)
-            return;
-        queue->size += 10;
-        queue->samples = samples;
-    }
-    queue->samples[queue->len].data = data;
-    queue->samples[queue->len].size = size;
-    queue->samples[queue->len].sample_number = sample;
-    queue->samples[queue->len].offset   = 0;
-    queue->samples[queue->len].own_data = 0;
-    queue->len++;
-}
-
-/**
- * Make local copies of all referenced sample data in the queue.
- */
-static void sample_queue_retain(HintSampleQueue *queue)
-{
-    int i;
-    for (i = 0; i < queue->len; ) {
-        HintSample *sample = &queue->samples[i];
-        if (!sample->own_data) {
-            uint8_t *ptr = av_malloc(sample->size);
-            if (!ptr) {
-                /* Unable to allocate memory for this one, remove it */
-                memmove(queue->samples + i, queue->samples + i + 1,
-                        sizeof(HintSample)*(queue->len - i - 1));
-                queue->len--;
-                continue;
-            }
-            memcpy(ptr, sample->data, sample->size);
-            sample->data = ptr;
-            sample->own_data = 1;
-        }
-        i++;
-    }
-}
-
-/**
- * Find matches of needle[n_pos ->] within haystack. If a sufficiently
- * large match is found, matching bytes before n_pos are included
- * in the match, too (within the limits of the arrays).
- *
- * @param haystack buffer that may contain parts of needle
- * @param h_len length of the haystack buffer
- * @param needle buffer containing source data that have been used to
- *               construct haystack
- * @param n_pos start position in needle used for looking for matches
- * @param n_len length of the needle buffer
- * @param match_h_offset_ptr offset of the first matching byte within haystack
- * @param match_n_offset_ptr offset of the first matching byte within needle
- * @param match_len_ptr length of the matched segment
- * @return 0 if a match was found, < 0 if no match was found
- */
-static int match_segments(const uint8_t *haystack, int h_len,
-                          const uint8_t *needle, int n_pos, int n_len,
-                          int *match_h_offset_ptr, int *match_n_offset_ptr,
-                          int *match_len_ptr)
-{
-    int h_pos;
-    for (h_pos = 0; h_pos < h_len; h_pos++) {
-        int match_len = 0;
-        int match_h_pos, match_n_pos;
-
-        /* Check how many bytes match at needle[n_pos] and haystack[h_pos] */
-        while (h_pos + match_len < h_len && n_pos + match_len < n_len &&
-               needle[n_pos + match_len] == haystack[h_pos + match_len])
-            match_len++;
-        if (match_len <= 8)
-            continue;
-
-        /* If a sufficiently large match was found, try to expand
-         * the matched segment backwards. */
-        match_h_pos = h_pos;
-        match_n_pos = n_pos;
-        while (match_n_pos > 0 && match_h_pos > 0 &&
-               needle[match_n_pos - 1] == haystack[match_h_pos - 1]) {
-            match_n_pos--;
-            match_h_pos--;
-            match_len++;
-        }
-        if (match_len <= 14)
-            continue;
-        *match_h_offset_ptr = match_h_pos;
-        *match_n_offset_ptr = match_n_pos;
-        *match_len_ptr = match_len;
-        return 0;
-    }
-    return -1;
-}
-
-/**
- * Look for segments in samples in the sample queue matching the data
- * in ptr. Samples not matching are removed from the queue. If a match
- * is found, the next time it will look for matches starting from the
- * end of the previous matched segment.
- *
- * @param data data to find matches for in the sample queue
- * @param len length of the data buffer
- * @param queue samples used for looking for matching segments
- * @param pos the offset in data of the matched segment
- * @param match_sample the number of the sample that contained the match
- * @param match_offset the offset of the matched segment within the sample
- * @param match_len the length of the matched segment
- * @return 0 if a match was found, < 0 if no match was found
- */
-static int find_sample_match(const uint8_t *data, int len,
-                             HintSampleQueue *queue, int *pos,
-                             int *match_sample, int *match_offset,
-                             int *match_len)
-{
-    while (queue->len > 0) {
-        HintSample *sample = &queue->samples[0];
-        /* If looking for matches in a new sample, skip the first 5 bytes,
-         * since they often may be modified/removed in the output packet. */
-        if (sample->offset == 0 && sample->size > 5)
-            sample->offset = 5;
-
-        if (match_segments(data, len, sample->data, sample->offset,
-                           sample->size, pos, match_offset, match_len) == 0) {
-            *match_sample = sample->sample_number;
-            /* Next time, look for matches at this offset, with a little
-             * margin to this match. */
-            sample->offset = *match_offset + *match_len + 5;
-            if (sample->offset + 10 >= sample->size)
-                sample_queue_pop(queue); /* Not enough useful data left */
-            return 0;
-        }
-
-        if (sample->offset < 10 && sample->size > 20) {
-            /* No match found from the start of the sample,
-             * try from the middle of the sample instead. */
-            sample->offset = sample->size/2;
-        } else {
-            /* No match for this sample, remove it */
-            sample_queue_pop(queue);
-        }
-    }
-    return -1;
-}
-
-static void output_immediate(const uint8_t *data, int size,
-                             AVIOContext *out, int *entries)
-{
-    while (size > 0) {
-        int len = size;
-        if (len > 14)
-            len = 14;
-        avio_w8(out, 1); /* immediate constructor */
-        avio_w8(out, len); /* amount of valid data */
-        avio_write(out, data, len);
-        data += len;
-        size -= len;
-
-        for (; len < 14; len++)
-            avio_w8(out, 0);
-
-        (*entries)++;
-    }
-}
-
-static void output_match(AVIOContext *out, int match_sample,
-                         int match_offset, int match_len, int *entries)
-{
-    avio_w8(out, 2); /* sample constructor */
-    avio_w8(out, 0); /* track reference */
-    avio_wb16(out, match_len);
-    avio_wb32(out, match_sample);
-    avio_wb32(out, match_offset);
-    avio_wb16(out, 1); /* bytes per block */
-    avio_wb16(out, 1); /* samples per block */
-    (*entries)++;
-}
-
-static void describe_payload(const uint8_t *data, int size,
-                             AVIOContext *out, int *entries,
-                             HintSampleQueue *queue)
-{
-    /* Describe the payload using different constructors */
-    while (size > 0) {
-        int match_sample, match_offset, match_len, pos;
-        if (find_sample_match(data, size, queue, &pos, &match_sample,
-                              &match_offset, &match_len) < 0)
-            break;
-        output_immediate(data, pos, out, entries);
-        data += pos;
-        size -= pos;
-        output_match(out, match_sample, match_offset, match_len, entries);
-        data += match_len;
-        size -= match_len;
-    }
-    output_immediate(data, size, out, entries);
-}
-
-/**
- * Write an RTP hint (that may contain one or more RTP packets)
- * for the packets in data. data contains one or more packets with a
- * BE32 size header.
- *
- * @param out buffer where the hints are written
- * @param data buffer containing RTP packets
- * @param size the size of the data buffer
- * @param trk the MOVTrack for the hint track
- * @param dts pointer where the timestamp for the written RTP hint is stored
- * @return the number of RTP packets in the written hint
- */
-static int write_hint_packets(AVIOContext *out, const uint8_t *data,
-                              int size, MOVTrack *trk, int64_t *dts)
-{
-    int64_t curpos;
-    int64_t count_pos, entries_pos;
-    int count = 0, entries;
-
-    count_pos = avio_tell(out);
-    /* RTPsample header */
-    avio_wb16(out, 0); /* packet count */
-    avio_wb16(out, 0); /* reserved */
-
-    while (size > 4) {
-        uint32_t packet_len = AV_RB32(data);
-        uint16_t seq;
-        uint32_t ts;
-        int32_t  ts_diff;
-
-        data += 4;
-        size -= 4;
-        if (packet_len > size || packet_len <= 12)
-            break;
-        if (RTP_PT_IS_RTCP(data[1])) {
-            /* RTCP packet, just skip */
-            data += packet_len;
-            size -= packet_len;
-            continue;
-        }
-
-        if (packet_len > trk->max_packet_size)
-            trk->max_packet_size = packet_len;
-
-        seq = AV_RB16(&data[2]);
-        ts  = AV_RB32(&data[4]);
-
-        if (trk->prev_rtp_ts == 0)
-            trk->prev_rtp_ts = ts;
-        /* Unwrap the 32-bit RTP timestamp that wraps around often
-         * into a not (as often) wrapping 64-bit timestamp. */
-        ts_diff = ts - trk->prev_rtp_ts;
-        if (ts_diff > 0) {
-            trk->cur_rtp_ts_unwrapped += ts_diff;
-            trk->prev_rtp_ts = ts;
-            ts_diff = 0;
-        }
-        if (*dts == AV_NOPTS_VALUE)
-            *dts = trk->cur_rtp_ts_unwrapped;
-
-        count++;
-        /* RTPpacket header */
-        avio_wb32(out, 0); /* relative_time */
-        avio_write(out, data, 2); /* RTP header */
-        avio_wb16(out, seq); /* RTPsequenceseed */
-        avio_wb16(out, ts_diff ? 4 : 0); /* reserved + flags (extra_flag) */
-        entries_pos = avio_tell(out);
-        avio_wb16(out, 0); /* entry count */
-        if (ts_diff) { /* if extra_flag is set */
-            avio_wb32(out, 16); /* extra_information_length */
-            avio_wb32(out, 12); /* rtpoffsetTLV box */
-            avio_write(out, "rtpo", 4);
-            avio_wb32(out, ts_diff);
-        }
-
-        data += 12;
-        size -= 12;
-        packet_len -= 12;
-
-        entries = 0;
-        /* Write one or more constructors describing the payload data */
-        describe_payload(data, packet_len, out, &entries, &trk->sample_queue);
-        data += packet_len;
-        size -= packet_len;
-
-        curpos = avio_tell(out);
-        avio_seek(out, entries_pos, SEEK_SET);
-        avio_wb16(out, entries);
-        avio_seek(out, curpos, SEEK_SET);
-    }
-
-    curpos = avio_tell(out);
-    avio_seek(out, count_pos, SEEK_SET);
-    avio_wb16(out, count);
-    avio_seek(out, curpos, SEEK_SET);
-    return count;
-}
-
-int ff_mov_add_hinted_packet(AVFormatContext *s, AVPacket *pkt,
-                             int track_index, int sample,
-                             uint8_t *sample_data, int sample_size)
-{
-    MOVMuxContext *mov = s->priv_data;
-    MOVTrack *trk = &mov->tracks[track_index];
-    AVFormatContext *rtp_ctx = trk->rtp_ctx;
-    uint8_t *buf = NULL;
-    int size;
-    AVIOContext *hintbuf = NULL;
-    AVPacket hint_pkt;
-    int ret = 0, count;
-
-    if (!rtp_ctx)
-        return AVERROR(ENOENT);
-    if (!rtp_ctx->pb)
-        return AVERROR(ENOMEM);
-
-    if (sample_data)
-        sample_queue_push(&trk->sample_queue, sample_data, sample_size, sample);
-    else
-        sample_queue_push(&trk->sample_queue, pkt->data, pkt->size, sample);
-
-    /* Feed the packet to the RTP muxer */
-    ff_write_chained(rtp_ctx, 0, pkt, s);
-
-    /* Fetch the output from the RTP muxer, open a new output buffer
-     * for next time. */
-    size = avio_close_dyn_buf(rtp_ctx->pb, &buf);
-    if ((ret = ffio_open_dyn_packet_buf(&rtp_ctx->pb,
-                                        RTP_MAX_PACKET_SIZE)) < 0)
-        goto done;
-
-    if (size <= 0)
-        goto done;
-
-    /* Open a buffer for writing the hint */
-    if ((ret = avio_open_dyn_buf(&hintbuf)) < 0)
-        goto done;
-    av_init_packet(&hint_pkt);
-    count = write_hint_packets(hintbuf, buf, size, trk, &hint_pkt.dts);
-    av_freep(&buf);
-
-    /* Write the hint data into the hint track */
-    hint_pkt.size = size = avio_close_dyn_buf(hintbuf, &buf);
-    hint_pkt.data = buf;
-    hint_pkt.pts  = hint_pkt.dts;
-    hint_pkt.stream_index = track_index;
-    if (pkt->flags & AV_PKT_FLAG_KEY)
-        hint_pkt.flags |= AV_PKT_FLAG_KEY;
-    if (count > 0)
-        ff_mov_write_packet(s, &hint_pkt);
-done:
-    av_free(buf);
-    sample_queue_retain(&trk->sample_queue);
-    return ret;
-}
-
-void ff_mov_close_hinting(MOVTrack *track)
-{
-    AVFormatContext *rtp_ctx = track->rtp_ctx;
-    uint8_t *ptr;
-
-    av_freep(&track->enc);
-    sample_queue_free(&track->sample_queue);
-    if (!rtp_ctx)
-        return;
-    if (rtp_ctx->pb) {
-        av_write_trailer(rtp_ctx);
-        avio_close_dyn_buf(rtp_ctx->pb, &ptr);
-        av_free(ptr);
-    }
-    avformat_free_context(rtp_ctx);
-}